McCain: I'm with Mitt on Trump
© Getty Images

John McCainJohn McCainUS should keep leading the global economy, not close off borders Putin aide slams McCain: Thank God he doesn't shape foreign policy Juan Williams: Trump morphs into Nixon MORE on Thursday joined fellow former Republican presidential nominee Mitt Romney to blast current party front-runner Donald TrumpDonald TrumpMSNBC wins cable news weekly war for first time ever Saudi king: Trump visit a ‘turning point’ Tomi Lahren accepts role with pro-Trump advocacy group MORE.  

The Arizona senator said he has the concerns about Trump that Romney expressed during a blistering speech on Trump's failed business ventures and vision for the country.
 
ADVERTISEMENT
"I would also echo the many concerns about Mr. Trump’s uninformed and indeed dangerous statements on national security issues that have been raised by 65 Republican defense and foreign policy leaders," McCain said in a statement. 
 
McCain, who sits on the Senate Armed Services Committee, mentioned international threats facing the U.S. from countries including Russia, China, Iran and North Korea. 
 
"I want Republican voters to pay close attention to what our party's most respected and knowledgeable leaders and national security experts are saying about Mr. Trump," McCain said.
 
The 2008 Republican presidential candidate called on voters to "think long and hard" about their chose for commander in chief, drawing into question the real estate mogul's credentials on the issue.
 
Still, McCain said Wednesday on a radio program that he would support the GOP nominee, even if it were Trump, despite differences in an effort to defeat Hillary ClintonHillary Rodham ClintonHouse Democrats expand 2018 targets The Hill's 12:30 Report Podesta: Trump 'unfit' for office MORE, the Democratic front-runner.
 
Romney, the 2012 GOP nominee, went after Trump's foreign policy credibility during his speech at the University of Utah, where he characterized the controversial billionaire as lacking the temperament to be president.
 
He also referenced Trump's mocking last year of McCain's capture during the Vietnam War.
 
Trump ripped Romney as a "failed candidate" ahead of his speech, pointing out that Romney took his endorsement when he ran for president.