After months of largely avoiding questions about Donald Trump, Sen. John McCain broke his silence about the presumptive Republican presidential nominee's provocative rhetoric that targeted McCain last summer.
Trump ignited a firestorm last July for his criticism of McCain, asserting he was only a war hero "because he was captured."
"I like people that weren't captured," Trump said then.
See photos of John McCain's capture and rescue:
John McCain military capture and rescue
John McCain broke his silence about Donald Trump's controversial comments on prisoners of war
A photo taken by a French cameraman in 1967 shows US Navy Airforce Major John McCain lying on a bed in a Hanoi hospital as he was being given medical care for his injuries. John McCain was captured in 1967 at a lake in Hanoi after his Navy warplane was downed by the Northern Vietnamese army during the Vietnam War.
P368426 01: (File Photo) Senator John Mccain Is Pulled Out Of A Hanoi Lake By North Vietnamese Army Soldiers And Civilians October 26, 1967 In Hanoi, North Vietnam. Mccain's A-4E Skyhawk Was Shot Down By A Surface-To-Air Missile. Mccain Broke Both Arms And His Right Knee Upon Ejection And Lost Consciousness Until He Hit The Water. (Photo By Getty Images)
P368426 04: (File Photo) Senator John Mccain In A Hanoi Hospital During The Vietnam War November, 1967. (Photo By Getty Images)
P368426 06: (File Photo) A Statue Commemorating October 26, 1967, The Day Lt. Cmdr. John Mccain Was Captured By The North Vietnamese Army, Stands In Hanoi, North Vietnam. (Photo By Getty Images)
P368426 05: (File Photo) A Mug Shot Of Senator John Mccain As A P.O.W. Taken By The North Vietnamese Sometime Between 1967-73 (Photo By Getty Images)
HANOI, VIET NAM: This file picture taken in 1967 shows US Navy Airforce Major John McCain lying on a bed in a Hanoi hospital as he was being given medical care for his injuries. McCain was captured in 1967 at a lake in Hanoi after his Navy warplane was downed by the Northern Vietnamese army during the Vietnam War. One of his rescuers said 24 February 2000, McCain was well treated after being pulled from the lake by villagers. McCain said that upon capture he was beaten by an angry mob and bayoneted in the groin. (B/W ONLY) AFP PHOTO (Photo credit should read AFP/Getty Images)
U.S. Naval Lt. Commander John S. McCain III, son of the Navy's Commander-in-Chief in Europe and grandson of the Navy's greatest World War II carrier commanders, is show in July, 1967, in Vietnam. (AP Photo)
John McCain walks outside the Hoa Lo prison, nicknamed "The Hanoi Hilton" in Hanoi, Vietman on April 26, 2000 where McCain was kept as a prisoner of war from October 1967 until March 1973. McCain was visiting as Vietnam marked the 25th anniversary of the end of the war. (AP Photo/David Guttenfelder)
John McCain walks inside the Hoa Lo prison, nicknamed "The Hanoi Hilton" in Hanoi, Vietman on April 27, 2000 where McCain was kept as a prisoner of war from October 1967 until March 1973. McCain was visiting as Vietnam marked the 25th anniversary of the end of the war. (AP Photo/David Guttenfelder)
Sen. John McCain, R-Ariz., tells his son Jack about his time as a Vietnam war P.O.W. as they look into a prison cell at the Hoa Lo prison, nicknamed "The Hanoi Hilton" by American prisoners, during a visit in this April 26, 2000 file photo. McCain was a P.O.W. from October 1967 to March 1973 and spent 3 years locked in the Hoa Lo. McCain, his wife Cindy, and son were visiting Vietnam as the country prepares to mark the 25th anniversary of the end of the war on April 30. (AP Photo/David Guttenfelder, File)
U.S. Sen. John McCain, R-Ariz, is seen during a tour of Hoa Lo Prison site, Hanoi, Vietnam, Wednesday, April 8, 2009. The photo behind McCain is that the Hanoi army and people pull out McCain out of Truc Back Lake on Oct. 26, 1967 after his plane was shot down. (AP Photo/Chitose Suzuki)
Mai Van On gestures to U.S. Senator John McCain, left, on Wednesday, Nov. 13, 1996 while describing how he pulled on McCain's parachute to save him from Hanoi's Truc Bach lake in 1967. McCain, then a U.S. bomber pilot in the Vietnam War, was shot down over Hanoi 29 years ago. (AP Photo/Hong Sam)
John McCain stands next to a monument marking the spot on the banks of Lake Truc Bach in Hanoi, Vietman on April 26, 2000 where McCain was pulled ashore after his plane was shot down in October 1967. McCain was visiting as Vietnam marked the 25th anniversary of the end of the war. (AP Photo/David Guttenfelder)
Lt. Commander John S. McCain III, 30, right, shown in 1967, member of a famous U.S. Navy family and an aircraft carrier pilot, was shot down and captured in Hanoi. His father, John S. McCain Jr., center, is the U.S. Navy's commander in chief in Europe. His granfather, left, Adm. John S. McCain, commanded all U.S. aircraft carriers in the Pacific during World War II. (AP Photo)
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In a CNN interview Sunday, the Arizona senator called on Trump to apologize to former prisoners of war.
"I think it's important for Donald Trump to express his appreciation for veterans," McCain said.
The Arizona Republican, a decorated Vietnam War veteran who spent years in captivity after being shot down during the war, emphasized that the apology should not be about him.
"What he said about me, John McCain, that's fine. I don't require any repair of that," McCain said. "But when he said, 'I don't like people who were captured,' then there's a body of American heroes, and I'd like to see him retract that statement. Not about me, but about the others."
Though McCain said he'd support Trump's presidential bid, he added that Trump's ad-hominem attacks during the campaign bothered him "a lot."
Related: The many faces of Donald Trump:
The many faces of Donald Trump
John McCain broke his silence about Donald Trump's controversial comments on prisoners of war
FORT WORTH, TX - FEBRUARY 26: Republican presidential candidate Donald Trump speaks at a rally at the Fort Worth Convention Center on February 26, 2016 in Fort Worth, Texas. Trump is campaigning in Texas, days ahead of the Super Tuesday primary. (Photo by Tom Pennington/Getty Images)
Republican presidential candidate Donald Trump gestures as he speaks at a campaign rally Friday, Feb. 5, 2016, in Florence, S.C. (AP Photo/John Bazemore)
Republican presidential candidate Donald Trump speaks during a campaign stop Wednesday, Feb. 3, 2016, in Little Rock, Ark. (AP Photo/Tony Gutierrez)
Republican presidential candidate Donald Trump holds up a child he pulled from the crowd as he arrives to speak at a campaign rally in New Orleans, Friday, March 4, 2016. (AP Photo/Gerald Herbert)
TOPSHOT - Republican presidential candidate Donald Trump gestures during a campaign rally in North Charleston, South Carolina, February 19, 2016. / AFP / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
Republican presidential candidate businessman Donald Trump gestures during the Republican Presidential Debate, hosted by CNN, at The Venetian Las Vegas on December 15, 2015 in Las Vegas, Nevada. AFP PHOTO/ ROBYN BECK / AFP / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)
Republican presidential candidate Donald Trump speaks during a campaign event at Plymouth State University Sunday, Feb. 7, 2016, in Plymouth, N.H. (AP Photo/David Goldman)
Pastor Joshua Nink, right, prays for Republican presidential candidate Donald Trump, as wife, Melania, left, watches after a Sunday service at First Christian Church Sunday, Jan. 31, 2016, in Council Bluffs, Iowa. (AP Photo/Jae C. Hong)
Republican presidential candidate Donald Trump speaks during a campaign rally in North Charleston, South Carolina, February 19, 2016. / AFP / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
Republican presidential candidate, businessman Donald Trump blows a kiss after speaking at his caucus night rally, Monday, Feb. 1, 2016, in West Des Moines, Iowa. (AP Photo/Jae C. Hong)
Republican presidential candidate Donald Trump speaks during a campaign rally at the Pensacola Bay Center in Pensacola, Fla., Wednesday, Jan. 13, 2016. (AP Photo/Michael Snyder)
Republican presidential candidate Donald Trump speaks during a campaign stop before next months earliest in the nation presidential primary, Monday, Jan. 11, 2016, in Windham,NH (AP Photo/Jim Cole)
RENO, NV - JANUARY 10: Republican presidential candidate Donald Trump holds a campaign rally at the Reno Event Center on January 10, 2016 in Reno, Nevada. Donald Trump continued to raise doubts Sunday about rival Ted Cruzs eligibility for the presidency, saying Republicans will risk losing a lawsuitand potentially the nations highest officeif they nominate Cruz as their candidate.
(Photos by Charles Ommanney/The Washington Post via Getty Images)
Republican presidential candidate Donald Trump pops through a doorway as he arrives to address a gathering during a campaign stop at a Rotary Club luncheon in Manchester, N.H., Monday, Feb. 8, 2016. (AP Photo/Charles Krupa)
Republican presidential candidate, businessman Donald Trump speaks during a rally at the Greater Columbus Convention Center in Columbus, Ohio, Monday, Nov. 23, 2015. (AP Photo/Paul Vernon)
MESA, AZ - DECEMBER 16: Republican presidential candidate Donald Trump speaks to guest gathered during a campaign event at the International Air Response facility on December 16, 2015 in Mesa, Arizona. Trump is in Arizona the day after the Republican Presidential Debate hosted by CNN in Las Vegas, Nevada. (Photo by Ralph Freso/Getty Images)
Republican Candidate Donald Trump arrives to speaks to the press with Rev. Darrell Scott(R), senior pastor of the New Spirit Revival Center in Cleveland Heights after meetings with prominent African American clerics at Trump Tower in New York November 30 ,2015. AFP PHOTO / TIMOTHY A. CLARY / AFP / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
COLUMBUS, OH - NOVEMBER 23: Republican presidential candidate Donald Trump addresses supporters during a campaign rally at the Greater Columbus Convention Center on November 23, 2015 in Columbus, Ohio. Trump spoke about immigration and Obamacare, among other topics, to around 14,000 supporters at the event. (Photo by Ty Wright/Getty Images)
DORAL, FL - OCTOBER 23: Republican presidential candidate Donald J. Trump attends a campaigns rally In Florida at the Trump National Doral on October 23, 2015 in Doral, Florida. Trump leads most polls in the race for the Republican presidential nomination. (Photo by Johnny Louis/FilmMagic)
COLUMBIA, SC - SEPTEMBER 23: Republican presidential candidate Donald Trump leaves a campaign event September 23, 2015 in Columbia, South Carolina. Earlier today, Trump tweeted 'FoxNews has been treating me very unfairly & I have therefore decided that I won't be doing any more Fox shows for the foreseeable future.' (Photo by Sean Rayford/Getty Images)
Republican presidential candidate, businessman Donald Trump reacts during the CNN Republican presidential debate at the Ronald Reagan Presidential Library and Museum, Wednesday, Sept. 16, 2015, in Simi Valley, Calif. (AP Photo/Mark J. Terrill)
NEW YORK, NY - JULY 22: Donald Trump greets supporters, tourists and the curious after taping an interview with Anderson Cooper at a Trump owned building in mid-town Manhattan on July 22, 2015 in New York City. Trump, who is running for president on a Republican ticket, has come under intensifying criticism for his behavior on the campaign trail. The billionaire's most recent comments on Senator John McCain's war record in Vietnam have resulted in almost universal criticism from fellow candidates. (Photo by Spencer Platt/Getty Images)
Republican presidential candidate Donald Trump leaves for lunch after being summoned for jury duty in New York, Monday, Aug. 17, 2015. Trump was due to report for jury duty Monday in Manhattan. The front-runner said last week before a rally in New Hampshire that he would willingly take a break from the campaign trail to answer the summons. (AP Photo/Seth Wenig)
Donald Trump, president and chief executive of Trump Organization Inc. and 2016 Republican presidential candidate, left, looks on as Sam Clovis, newly appointed national co-chairman of Trumps campaign, speaks during a news conference ahead of a rally at Grand River Center in Dubuque, Iowa, U.S., on Tuesday, Aug. 25, 2015. President Barack Obama's top business ambassador dismissed Trump's call for a wall along the Mexico border, saying the U.S. is focused instead on expanding business with one of its biggest trade partners. Photographer: Daniel Acker/Bloomberg via Getty Images
BILOXI, MS - JANUARY 02: Republican presidential frontrunner Donald Trump pauses with supporters after speaking at the Mississippi Coast Coliseum on January 2, 2016 in Biloxi, Mississippi. Trump, who has strong support from Southern voters, spoke to thousands in the small Mississippi city on the Gulf of Mexico. Trump continues to split the GOP establishment with his populist and controversial views on immigration, muslims and some of his recent comments on women. (Photo by Spencer Platt/Getty Images)
Republican presidential candidate Donald Trump pulls his hair back to show that it is not a toupee while speaking during a rally at the TD Convention Center, Thursday, Aug. 27, 2015, in Greenville, S.C. Trump says his trademark hairdo is for real. He told 1,800 people in South Carolina Thursday: "It's my hair ... I swear." (AP Photo/Richard Shiro)
Supporters reach to great Republican presidential hopeful Donald Trump as he leaves a brief stop to speak to supporters and the media in Laredo, Texas, Thursday, July 23, 2015. Trump predicted Hispanics would love him, because as president he said he'd grab jobs back from overseas and give more opportunity to those who live in the U.S. legally. (AP Photo/LM Otero)
Republican presidential candidate Donald Trump gestures during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/John Minchillo)
Republican presidential hopeful Donald Trump remarks about Texas Gov. Rick Perry's glasses at his South Carolina campaign rally in Bluffton, S.C., Tuesday, July 21, 2015. (AP Photo/Stephen B. Morton)
LAREDO, TEXAS - JULY 23: Republican Presidential candidate and business mogul Donald Trump talks to the media at a press conference during his trip to the border on July 23, 2015 in Laredo, Texas. Trump's recent comments, calling some immigrants from Mexico as drug traffickers and rapists, have stirred up reactions on both sides of the aisle. Although fellow Republican presidential candidate Rick Perry has denounced Trump's comments and his campaign in general, U.S. Senator from Texas Ted-Cruz has so far refused to bash his fellow Republican nominee. (Photo by Matthew Busch/Getty Images)
Republican presidential candidate Donald Trump responds to former Arkansas Gov. Mike Huckabee's closing remarks during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
DES MOINES, IA - AUGUST 15: Republican presidential candidate Donald Trump eats a pork chop on a stick and gives a thumbs up sign to fairgoers at the Iowa State Fair on August 15, 2015 in Des Moines, Iowa. Presidential candidates are addressing attendees at the Iowa State Fair on the Des Moines Register Presidential Soapbox stage and touring the fairgrounds. The State Fair runs through August 23. (Photo by Win McNamee/Getty Images)
CLEVELAND, OH - AUGUST 06: Republican presidential candidates Donald Trump (R) and Wisconsin Gov. Scott Walker participate in the first prime-time presidential debate hosted by FOX News and Facebook at the Quicken Loans Arena August 6, 2015 in Cleveland, Ohio. The top-ten GOP candidates were selected to participate in the debate based on their rank in an average of the five most recent national political polls. (Photo by Chip Somodevilla/Getty Images)
OSKALOOSA, IA - JULY 25: Republican presidential hopeful businessman Donald Trump speaks to guests gathered for a rally on July 25, 2015 in Oskaloosa, Iowa. During his last visit to the state Trump sparked controversy when he said Senator John McCain (R-AZ), a former POW, was not a war hero. (Photo by Scott Olson/Getty Images)
Republican presidential candidate, businessman Donald Trump, speaks during the Values Voter Summit, held by the Family Research Council Action, Friday, Sept. 25, 2015, in Washington. ( AP Photo/Jose Luis Magana)
Republican presidential candidate, businessman Donald Trump addresses supporters at a campaign rally, Monday, Dec. 21, 2015, in Grand Rapids, Mich. (AP Photo/Carlos Osorio)
TURNBURRY, SCOTLAND - JUNE 08: Donald Trump Visits Turnberry Golf Club, after its $10 Million refurbishment, on June 8, 2015 in Turnberry, Scotland. (Photo by Ian MacNicol/Getty Images)
DERRY, NH - AUGUST 19: U.S. Republican presidential candidate Donald Trump hugs an American flag as he takes the stage for a town hall meeting in Derry, New Hampshire, August 19, 2015. (Keith Bedford/The Boston Globe via Getty Images)
DES MOINES, IOWA - AUGUST 15: Donald Trump at the Iowa State Fair on August 14, 2015 in Des Moines, Iowa. The Iowa State Fair is one of the oldest and largest agricultural and industrial expositions in the United States. The annual fair, the largest event in Iowa, attracts over a million visitors each year. The fair runs through August 23. After a brief walk around its time for Mr Trump to board his club cart again and leave the fair. (Photos by Charles Ommanney/The Washington Post via Getty Images)
AYR, SCOTLAND - JULY 30: Republican Presidential Candidate Donald Trump visits his Scottish golf course Turnberry on July 30, 2015 in Ayr, Scotland. Donald Trump answered questions from the media at a press conference. (Photo by Jeff J Mitchell/Getty Images)
TURNBURRY, SCOTLAND - JUNE 08: Donald Trump visits Turnberry Golf Club, after its $10 Million refurbishment on June 8, 2015 in Turnberry, Scotland. (Photo by Ian MacNicol/Getty Images)
Donald Trump, president and chief executive of Trump Organization Inc. and 2016 U.S. presidential candidate, gestures while speaking during The Family Leadership Summit in Ames, Iowa, U.S., on Saturday, July 18, 2015. The sponsor, The FAMiLY LEADER, is a 'pro-family, pro-marriage, pro-life organization which champions the principle that God is the ultimate leader of the family.' Photographer: Daniel Acker/Bloomberg via Getty Images
PASADENA, CA - JANUARY 16: Donald Trump arrives at NBCUniversal's 2015 Winter TCA Tour - Day 2 at The Langham Huntington Hotel and Spa on January 16, 2015 in Pasadena, California. (Photo by Angela Weiss/Getty Images)
Donald Trump, president and chief executive officer of Trump Organization Inc. and 2016 Republican presidential candidate, pauses while speaking during a news conference at Trump Towers in New York, U.S., on Thursday, Sept. 3, 2015. 'I have signed the pledge,' he said, referring to a document stating that he would not run as an independent candidate in the event that he does not win the Republican nomination. Photographer: Victor J. Blue/Bloomberg via Getty Images
US tycoon Donald Trump arrives to speak at the annual Conservative Political Action Conference (CPAC) at National Harbor, Maryland, outside Washington, on February 27, 2015. AFP PHOTO/NICHOLAS KAMM (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)
EDISON, NJ - AUGUST 30: A golf fan takes a 'selfie' with presidential candidate Donald Trump during the final round of The Barclays at Plainfield Country Club on August 30, 2015 in Edison, New Jersey. (Photo by Ross Kinnaird/Getty Images)
ABERDEEN, SCOTLAND - JULY 10: Donald Trump plays a round of golf after the opening of The Trump International Golf Links Course on July 10, 2012 in Balmedie, Scotland. The controversial Â£100m course opens to the public on Sunday July 15. Further plans to build hotels and homes on the site have been put on hold until a decision has been made on the building of an offshore windfarm nearby. (Photo by Ian MacNicol/Getty Images)
BIRCH RUN, MI - AUGUST 11: Republican presidential candidate Donald Trump speaks at a press conference before delivering the keynote address at the Genesee and Saginaw Republican Party Lincoln Day Event August 11, 2015 in Birch Run, Michigan. This is Trump's first campaign event since his Republican debate last week. (Photo by Bill Pugliano/Getty Images)
BOCA RATON, FL - APRIL 16: Billionaire Donald Trump speaks to a crowd at the 2011 Palm Beach County Tax Day Tea Party April 16, 2011 at Sanborn Square in Boca Raton, Florida. Trump is considering a bid for the 2012 precidency and is expected to announce his running in the coming weeks. (Photo by John W. Adkisson/Getty Images)
Republican presidential candidate Donald Trump speaks during a campaign rally Saturday, Dec. 5, 2015, in Davenport, Iowa. (AP Photo/Charlie Neibergall)
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"You can almost violently disagree with someone on an issue. But to attack their character and their integrity — those wounds will take a long time to heal," McCain said.
Despite massive blowback from leaders of both parties, Trump has refused to apologize for his comments.
"People that fought hard and weren't captured and went through a lot, they get no credit. Nobody even talks about them. They're like forgotten. And I think that's a shame, if you want to know the truth," Trump said in July.
Despite his endorsement, McCain recently acknowledged privately that Trump's at-times inflammatory statements about immigration and plan to deport the approximately 11 million immigrants living in the US illegally have made his 2016 Senate reelection bid much more difficult.
"If Donald Trump is at the top of the ticket, here in Arizona, with over 30% of the vote being the Hispanic vote, no doubt that this may be the race of my life," McCain said at a private event, according to Politico. "If you listen or watch Hispanic media in the state and in the country, you will see that it is all anti-Trump. The Hispanic community is roused and angry in a way that I've never seen in 30 years."