For months, Trump has been targeting Schwarzenegger on Twitter. In January, POTUS tore into his lackluster "Celebrity Apprentice" TV ratings. "Wow, the ratings are in and Arnold Schwarzenegger got 'swamped' (or destroyed) by comparison to the ratings machine, DJT," the "ratings machine" himself tweeted out Friday morning. "So much for being a movie star-and that was season 1 compared to season 14. Now compare him to my season 1."
See photos of Arnold Schwarzenegger through the years:
Arnold Schwarzenegger through the years
Arnold Schwarzenegger through the years
"My body. *My* choice!"
As a kid himself!
LOS ANGELES, CA - SEPTEMBER 08: Actor and former California Governor Arnold Schwarzenegger and his daughter Katherine attend Trust Your Senses At DVF for Fashion's Night Out on September 8, 2011 in Los Angeles, California. (Photo by Amanda Edwards/Getty Images for DVF)
NEW ORLEANS - FEBRUARY 16: (LtoR) California governor Arnold Schwarzenegger with son Patrick Schwarzenegger, Maria Shriver and Christopher Schwarzenegger watch during NBA All-Star Saturday Night part of 2008 NBA All-Star Weekend at the New Orleans Arena on February 16, 2008 in New Orleans, Louisiana. (Photo by Bryan Bedder/Getty Images)
UNITED STATES - NOVEMBER 16: Arnold Schwarzenegger and wife Maria Shriver are on hand at the Plaza Hotel where he was honored with a Global Youth Peace & Tolerance Award. (Photo by Richard Corkery/NY Daily News Archive via Getty Images)
E366553 3/26/00 Los Angeles, Ca. Arnold Schwarzenegger And Wife Maria Shriver At The 72Nd Annual Academy Awards. Dave Mcnewonline Usa Inc. (Photo By David Mcnew/Getty Images)
368141 12: ***ESCLUSIVE*** Arnold Schwarzenegger plays in the hotel swimming pool with one of his daughters during an Easter vacation April 21, 2000 in Maui, Hawaii. (Photo by Chris Morton/Online USA)
BEIJING - MAY 19: (NO U.S. TABLOID SALES) Actor Arnold Schwarzenegger and his wife, television journalist Maria Shriver, visit the Forbidden City during a Special Olympics Event May 19, 2000 in Beijing, China. (Photo by David Hume Kennerly/Getty Images)
Arnold Schwarzenegger & Family during Hollywood Celebrity Families turn out to Celebrate Old Navy and P.S. Arts Partnership at Old Navy Store in Santa Monica, California, United States. (Photo by SGranitz/WireImage)
399207 01: Actor Arnold Schwarzenegger and his son, Patrick, pose in front of an F-22 Raptor with airmen in this undated recent photo at Edwards Air Force Base in California. In a recent poll, military members voted Schwarzenegger the star they would most like to meet. (Photo by Stacee McCausland/USAF/Getty Images)
SACRAMENTO, CALIFORNIA - NOVEMBER 17: California Governor-elect Arnold Schwarzenegger walks with his wife Maria Shriver and their four children to his inaugural ceremony at the State Capitol in Sacramento on Novemeber 17, 2003 in Sacramento, California. (Photo by Lucy Nicholson-Pool/Getty Images)
UNITED STATES - MAY 01: Eunice Shriver with daughter Maria, Arnold Schwarzenegger and some of her grandchildren attending the National Center on Poverty Law's Tribute to Sargent Shriver at the Beverly Hilton Hotel in Beverly Hills, CA 05/01/03 (Photo by Vinnie Zuffante/Getty Images)
BEVERLY HILLS, UNITED STATES: Actor Arnold Schwarzenegger(2nd from R) and his wife Maria Shriver(R) arrive at the premiere of the Steven Spielberg movie 'Amistad' with family members Bobby Shriver(L), Timothy Shriver(2nd from L) and his wife(C) 08 December in Beverly Hills. The film about a slave ship revolt stars Morgan Freeman and Anthony Hopkins. AFP PHOTO Vince BUCCI/mn (Photo credit should read Vince Bucci/AFP/Getty Images)
"Money doesn't make you happy. I now have $50 million but I was just as happy when I had $48 million."
"My body is like breakfast, lunch, and dinner. I don't think about it, I just have it."
"The mind is the limit. As long as the mind can envision the fact that you can do something, you can do it, as long as you really believe 100 percent."
"Milk is for babies. When you grow up you have to drink beer."
"I have to give the audiences what they enjoy seeing while I try to bring in a little something new"
"Strength does not come from winning. Your struggles develop your strengths. When you go through hardships and decide not to surrender, that is strength."
"You know, nothing is more important than education, because nowhere are our stakes higher; our future depends on the quality of education of our children today."
"People should make up their own mind about what they think of me."
On Friday, the action star announced that he "would decline" to return for another season of NBC's "Celebrity Apprentice" "even if asked," and blamed the show's poor showing on Trump — who starred in 14 seasons of the show and retained an executive producer credit even after winning the presidential election. Trump claimed Arnie was "fired by his bad (pathetic) ratings, not by me."
"With Trump being involved in the show people have a bad taste and don't want to participate as a spectator or as a sponsor or in any other way support the show," Schwarzenegger said. "It's a very divisive period now and I think this show got caught up in all that division."
Bound for the rigors of business school in the future, Donald Trump received discipline at an early age by attending a military academy. There, he reportedly excelled in extracurricular activities such as being the Honor Cadet.
Donald Trump in the New York Military Academy's 1964 yearbook
As someone who loves the art of negotiation, Donald Trump was able to negotiate New York City to provide a 40-year tax abatement for the Grand Hyatt Hotel — the first ever granted to a commercial property.
(Photo by NY Daily News Archive via Getty Images)
Master renovator: Trump offered to renovate decrepit areas in need, such as a long-closed ice-skating rink, at no profit to himself, after the city's renovation effort went through five years of delays and more than double the original cost estimate.
(Photo by Michael Schwartz / (c) NYP Holdings, Inc. via Getty Images)
Trump's enterprise also stretched out into sports, where he was the original owner of the New Jersey Generals of the United States Football League.
EAST RUTHERFORD, NJ - CIRCA 1983: Team Owner Donald Trump announces he has signed Herschel Walker to play running back for the New Jersey Generals in New Jersey. Walker played for the General form 1983-85.
(Photo by Sporting News via Getty Images)
Trump owns a fleet of luxury helicopters.
Donald Trump, real estate mogul, entrepreneur, and billionare, utilizes his personal helicopter to get around on August 1987 in New York City.
(Photo by Joe McNally/Getty Images)
Trump was also notorious for befriending attractive supermodels. His first wife, Ivana, a Czech-American, was a member of the social elite.
Ivana Trump and Donald Trump are seen in December 1982 in New York City.
(Photo by Sonia Moskowitz/Getty Images)
No expense was spared for his belongings, as Donald Trump once paid the sultan of Brunei $30 million for a nearly 300-foot yacht.
American businessman Donald Trump and his wife Ivana sit at a table on board their luxury yacht The Trump Princess, anchored outside the Water Club, New York City, July 1988.
(Photo by Tom Gates/Getty Images)
To test the political waters, the potential Reform Party presidential candidate traveled to several areas to address party leaders.
New York real estate developer Donald Trump (L) answers questions as Minnesota Governor Jesse Ventura looks on in Brooklyn Park, January 7. Trump said on Friday he "very well might" make a run for president under the Reform Party banner but had not made a final decision. "I'm looking very seriously if I can win," he told reporters. "And if I can win, I believe I can do a very good job." Trump came to Minnesota to raise money for the party's highest elected official, Governor Ventura, who made it clear that he and the New York developer were on the same wavelength.
(STR New / Reuters)
Trump also enjoys tennis — he even played a round, wearing his traditional suit, against the legendary Serena Williams.
Developer Donald Trump talks with his former wife Ivana Trump during the men's final at the U.S. Open September 7, 1997. REUTERS/File Photo
He also became the owner of the infamous Miss Universe beauty pageant for many years.
Donald Trump and Miss Connecticut USA Erin Brady poses onstage after winning the 2013 Miss USA pageant at PH Live at Planet Hollywood Resort & Casino on June 16, 2013 in Las Vegas, Nevada.
(Photo by Michael Stewart/WireImage)
Unbeknownst to many, Donald Trump is a formidable opponent on the green. He owns 15 golf courses.
Donald Trump announced on Saturday, 11/9/02 a major addition to his West Coast properties as he purchased the Ocean Trails Golf Club in Rancho Palos Verdes. He discussed the improvements and additions to the club to members of the Rancho Palos Verdes community on Saturday morning. Ocean Trails made headlines in 1999 when days before its scheduled opening, part of the course's 18th hole slid into the Pacific Ocean. The club will reopen in June, 2003 under Trump's direction.
(Photo by Gary Friedman/Los Angeles Times via Getty Images)
Sometimes, negotiating can be a tough sport. What better way to exert your dominance by taking the center stage among the world's most bombastic figures?
Donald Trump, Stone Cold Steve Austin and WWE wrestler Bobby Lashley get ready to shave Vince McMahon's head after McMahons lost the main event of the night, 'Hair vs. Hair', between Vince McMahon and Donald Trump. WrestleMania 23 at Detroit's Ford Field in Detroit, Michigan on April 1, 2007.
(Photo by Leon Halip/WireImage)
As the fog of the political battlefield has cleared on the Republican side, Trump is now preparing for a likely battle with presumptive Democratic nominee Hillary Clinton.
Donald Trump (C), flanked by his children Ivanka and Donald Trump Jr., addresses the media in Chicago May 10, 2006. Trump was in Chicago to speak about his Trump International Hotel and Tower Chicago that is being built on the old site of the Chicago Sun-Times building on the north side of the Chicago River.
(REUTERS/Stephen J. Carrera)
Being the entertaining host, Trump also spared no expense in providing a spectacular show for friends and family.
Developer and multi-millionaire Donald Trump (R) watches as ex-wife Marla Maples gets a kiss from Earl Sinclair of TV's 'Dinosaurs' during lunch at the Trump Plaza Hotel November 2, 1992. REUTERS/Henry Ray Abrams
As a self-proclaimed family man, Trump attended many public events and television shows with his family, even before his current campaign.
Donald Trump and Ivanka Trump attend U.S. Open Tennis Tournament on August 30, 1991 at Flushing Meadows Park in New York City. (Photo by Ron Galella/WireImage)
As no stranger to the political process, Donald Trump was even acquainted with members of the judicial branch.
U.S. Supreme Court Justice Clarence Thomas (L), serving as the grand marshal for the Daytona 500, speaks to Donald Trump on the starting grid at the Daytona International Speedway February 14. JLS/ELD
Trump famously launched his presidential campaign in June 2015 by coming down an escalator in Trump Tower. Since then, he has weathered waves of controversy to become the presumptive Republican presidential nominee.
(Photo by Christopher Gregory/Getty Images)
Trump made his final appeal to voters in swing-states as the contentious campaign drew to a close.
Donald Trump speaks at a rally at SNHU Arena in Manchester, NH, on Nov. 7, 2016, the night before election day. (Photo by Suzanne Kreiter/The Boston Globe via Getty Images)
President-elect Trump at his election night party at the Hilton Hotel in New York City.
NEW YORK, NY - NOVEMBER 09: Republican president-elect Donald Trump acknowledges the crowd during his election night event. (Photo by Joe Raedle/Getty Images)