Former Secretary of State Hillary Clinton gave a blistering critique on Thursday of GOP presidential frontrunner Donald Trump's emerging geopolitical worldview.
"Of course not," she told Business Insider CEO and editor in chief Henry Blodget, when asked if she had confidence in Trump's ability to lead the military. "No, of course not."
In the interview at Purchase College in New York, the Democratic frontrunner painted Trump's foreign policy as dangerous, out of step, and "illegal."
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'Of course not': Hillary Clinton says Donald Trump shouldn't lead the US military
BALTIMORE, MD - APRIL 10: Democratic presidential candidate Hillary Clinton holds a campaign rally at City Garage April 10, 2016 in Baltimore, Maryland. Voters will head to polling places for Maryland's presidential primary April 26. (Photo by Chip Somodevilla/Getty Images)
Democratic U.S. presidential candidate Hillary Clinton laughs as she listens to Representative Steve Israel (D-NY) speak on a gun control panel in Port Washington, New York April 11, 2016. REUTERS/Lucas Jackson
NEW YORK, NY - APRIL 09: Democratic presidential candidate Hillary Clinton holds a Latino organizing event on April 9, 2016 while campaigning in the Brooklyn Borough of New York City. The New York Democratic primary is scheduled for April 19th. (Photo by Andrew Renneisen/Getty Images)
SPRINGFIELD, MA - FEBRUARY 29: Democratic presidential candidate former Secretary of State Hillary Clinton speaks during a 'Get Out The Vote' rally at the Lyman & Merrie Wood Museum of Springfield History on February 29, 2016 in Springfield, Massachusetts. Hillary Clinton is campaigning in Massachusetts and Virginia ahead of Super Tuesday. (Photo by Justin Sullivan/Getty Images)
BOSTON, MA - Former Secretary of State Hillary Clinton speaks to supporters at the Old South Meeting Hall during a rally in Boston, Massachusetts on Monday February 29, 2016. (Photo by Melina Mara/The Washington Post via Getty Images)
MINNEAPOLIS, MN - MARCH 01: Democratic presidential candidate former Secretary of State Hillary Clinton greets patrons at Mapps Coffee on March 1, 2016 in Minneapolis, Minnesota. Hillary Clinton is campaigning in Minnesota as Super Tuesday voting takes place in 12 states. (Photo by Justin Sullivan/Getty Images)
MOUNT VERNON, IOWA - OCTOBER 7: Former Secretary of State Hillary Clinton speaks to voters during an outdoor town hall meeting at Cornell College in Mount Vernon, Iowa on Wednesday October 7, 2015. (Photo by Melina Mara/The Washington Post via Getty Images)
MUSCATINE, IOWA - OCTOBER 6: Former Secretary of State Hillary Clinton speaks to a voter before leaving a farm in Muscatine, Iowa on Tuesday October 6, 2015. (Photo by Melina Mara/The Washington Post via Getty Images)
MANCHESTER, NH - OCTOBER 05: Democratic presidential candidate Hillary Rodham Clinton holds a town hall meeting at the Manchester Community College on October 5, 2015 in Manchester, New Hampshire. Clinton spoke about the need for gun control on the wake of a mass shooting at another community college in Oregon. (Photo by Alfredo Sosa/The Christian Science Monitor via Getty Images)
DAVIE, FL - OCTOBER 02: Democratic presidential candidate Hillary Clinton speaks about gun control during her campaign stop at the Broward College Ã Hugh Adams Central Campus on October 2, 2015 in Davie, Florida. Hillary Clinton continues to campaign for the nomination of the Democratic Party as their presidential candidate. (Photo by Joe Raedle/Getty Images)
WASHINGTON, DC - SEPTEMBER 19: Hillary Clinton attends the Phoenix Awards Dinner at the 45th Annual Legislative Black Caucus Foundation Conference at Walter E. Washington Convention Center on September 19, 2015 in Washington, DC. (Photo by Earl Gibson III/Getty Images)
MANCHESTER, NH - SEPTEMBER 19: Democratic presidential candidate Hillary Clinton claps on stage during the New Hampshire Democratic Party Convention at the Verizon Wireless Center on September 19, 2015 in Manchester, New Hampshire. Challenger for the democratic vote Sen. Bernie Sanders (I-VT) has been gaining ground on Clinton in Iowa and New Hampshire. (Photo by Scott Eisen/Getty Images)
PORTLAND, ME - SEPTEMBER 18: Hillary Clinton brings her Democratic presidential campaign to Maine for the first time, speaking at King Middle School. Clinton is welcomed as she is introduced at the event. (Photo by Derek Davis/Portland Press Herald via Getty Images)
CEDAR RAPIDS, IA - SEPTEMBER 7: Democratic Presidential hopeful Hillary Clinton takes time to meet supporters and take photos at the Annual Hawkeye Labor Council AFL-CIO Labor Day picnic on September 7, 2015 at Hawkeye Downs in Cedar Rapids, Iowa. Clinton spent a busy Labor Day weekend in Iowa, meeting supporters throughout the state while trying to maintain a lead over Bernie Sanders for the Democratic nomination. (Photo by David Greedy/Getty Images)
US Democratic presidential candidate Hillary Clinton takes part in a discussion after speaking about the Iran nuclear deal at the Brookings Institution in Washington, DC, on September 9, 2015. Clinton expressed firm support for the nuclear accord with Iran, calling it flawed but still strong. Clinton added that the agreement must be strictly enforced and said that if elected president next year, she would not hesitate to use military force if Iran fails to live up to its word and tries to develop a bomb. AFP PHOTO/NICHOLAS KAMM (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)
PORTSMOUTH, NH - SEPTEMBER 5: Democratic presidential candidate Hillary Clinton and U.S. Senator Jeanne Shaheen take an off the schedule stop in the River Run Bookstore before shaking hands with onlookers on September 5, 2015 in Portsmouth, New Hampshire. (Photos by Charles Ommanney/The Washington Post via Getty Images)
PORTSMOUTH, NH - SEPTEMBER 5: Democratic Presidential candidate Hillary Clinton receives an endorsement from U.S. Senator Jeanne Shaheen (D-NH) September 5, 2015 in Portsmouth, New Hampshire. Clinton attended a Women for Hillary event at Portsmouth High School. (Photo by Darren McCollester/Getty Images)
PORTSMOUTH, NH - SEPTEMBER 5: Democratic Presidential candidate Hillary Clinton walks downtown Portsmouth and takes pictures with people September 5, 2015 in Portsmouth, New Hampshire. Clinton attended a Women for Hillary event at Portsmouth High School earlier in the day and received an endorsement from U.S. Senator Jeanne Shaheen (D-NH). (Photo by Darren McCollester/Getty Images)
LAS VEGAS, NEVADA - AUGUST 18: Former Secretary of State Hillary Clinton answers questions from journalists after speaking to north Las Vegas voters at a town hall meeting in Las Vegas, on Tuesday, August 18, 2015. The former Secretary was answering questions about emails sent and received a private server system, now in question, while she was the Secretary of State. (Photo by Melina Mara/The Washington Post via Getty Images)
UNITED STATES - August 15: Democratic presidential candidate Hillary Rodham Clinton greets fairgoers as she tours the Iowa State Fair in Des Moines, Iowa, on Saturday, August 15, 2015. (Photo By Al Drago/CQ Roll Call)
CARROLL, IA - JULY 26: Democratic presidential hopeful and former Secretary of State Hillary Clinton speaks to guests gathered for a house party on July 26, 2015 in Carroll, Iowa. Although Clinton leads all other Democratic contenders, a recent poll had her trailing several of the Republican candidates in Iowa. (Photo by Scott Olson/Getty Images)
CHICAGO, IL - MAY 20: Democratic presidential hopeful and former Secretary of State Hillary Clinton arrives for a meeting with parents and child care workers at the Center for New Horizons on May 20, 2015 in Chicago, Illinois. Clinton arrived in Chicago after campaigning Monday and Tuesday in Iowa. (Photo by Scott Olson/Getty Images)
LAS VEGAS, NV - MAY 05: Democratic presidential candidate and former U.S. Secretary of State Hillary Clinton (C) poses with students and faculty after speaking at Rancho High School on May 5, 2015 in Las Vegas, Nevada. Clinton said that any immigration reform would need to include a path to 'full and equal citizenship.' (Photo by Ethan Miller/Getty Images)
NEW YORK, NY - APRIL 23: Hillary Rodham Clinton (L) and actress Maggie Gyllenhaal attend the 2015 DVF Awards at United Nations on April 23, 2015 in New York City. (Photo by Michael Stewart/FilmMagic)
NEW YORK, NY - APRIL 29: Democratic presidential hopeful and former Secretary of State Hillary Clinton speaks during the David N. Dinkins Leadership and Public Policy Forum at Columbia University April 29, 2015 in New York City. Clinton addressed the unrest in Baltimore, called for police body cameras and a reform to sentencing. (Photo by Kevin Hagen/Getty Images)
Hillary Clinton announced her campaign for president on Sunday April, 12, 2015 with a video on YouTube.
(Screenshot from YouTube)
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She made specific mention of two of Trump's statements that have drawn scrutiny in recent days: his dismissal of the North Atlantic Treaty Organization alliance as "obsolete," and his suggestion that he might allow Japan and South Korea to develop nuclear weapons in exchange for an ease in US defense commitments to the countries.
"These are incredibly dangerous ideas that need to be confronted," she said.
Clinton also criticized Trump for embracing military tactics that are prohibited under international law. Trump has advocated targeting the families of terrorists and bringing back waterboarding, though he has more recently softened his stances on those positions.
"His suggestions are not only offensive but, in certain cases, dangerous and sometimes even illegal, like his dismissal of the laws of the United States international law when it comes to torture," she said.
Trump's diplomacy has come under increased scrutiny since last week's terrorist attacks in Brussels, which left more than 30 people dead and hundreds more injured. Since then, he has unveiled a slew of policy pronouncements, most notably in a lengthy New York Times interview.
Ten facts you should know about Hillary Clinton:
Hillary Clinton 10 Facts
'Of course not': Hillary Clinton says Donald Trump shouldn't lead the US military
1. She went by her maiden for years after she married Bill in 1975. She went by "Mrs. Bill Clinton" shortly after her husband lost the 1980 Arkansas gubernatorial election in part because voters had questioned their marriage's stability.
(Photo by Douglas Burrows/Liaison)
2. She once described herself as a tomboy who wanted to be an astronaut, and wrote to NASA as a 12-year-old about how she could become an astronaut. They sent her a reply, clarifying that NASA didn't accept women in their astronaut program.
(Photo by Karin Cooper, Getty)
3. She was the student speaker picked to give the commencement speech at Wellesley, and received a standing ovation.
(Photo by John Mottern, AFP/Getty Images)
6. In 1974, she was one of only three women out of 43 lawyers who worked on the inquiry into whether President Nixon would be impeached.
(Photo by David Hume Kennerly/Getty Images)
7. She named her daughter Chelsea after Joni Mitchell's song "Chelsea Morning."
(Photo by Daniel Berehulak/Getty Images)
9. She says she met Bill Clinton at the Yale law library when she approached him and said, "Look if you're going to keep staring at me, and I'm going to keep staring back, I think we should at least know each other. I'm Hillary Rodham. What's your name?"
(Photo by Mark Philips, AFP/Getty Images)
10. Her mother told her that she had been named after Sir Edmund Hillary, who was the first man to to climb Everest, despite the fact that he had done so five years after she was born. A spokesperson for Clinton has said that this was a "sweet family story her mother shared to inspire greatness in her daughter, to great results I might add."
(Photo by Vincent Laforet, AFP/Getty Images)
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Many national-security experts cast doubt on the effectiveness of Trump's plans. They have cast his suggestion that he might be open to a nuclear-capable Japan and South Korea, for instance, as a dangerous proposition with the propensity to fuel a regional or global nuclear-arms race.
"It would be a free-for-all," Jeffrey Lewis, the director of the East Asia Nonproliferation Program at the Middlebury Institute of International Studies, told Business Insider earlier this week. "It would be a giant science experiment that I would not want to see."
Clinton told Business Insider, meanwhile, that she has received messages from "bewildered" world leaders who are concerned about Trump's rise and rhetoric.
"They want to know what's going on," she said. "And the amount of publicity that he gets, the coverage that he gets — so he said some very ill-considered dangerous thing, and it's around the world in a nanosecond."