Senator John McCain and President Trump have made their distaste for one another very clear, and the former recently added to his criticisms of the nation’s leader.

Senator John McCain and President Trump have made their distaste for one another very clear, and the former recently added to his criticisms of the nation's leader. 
"I don't agree with the way he's conducting his presidency, obviously. He's an individual that unfortunately is not anchored by a set of principles," McCain said of Trump in an interview with Esquire.
"I think he's a person who takes advantage of situations," McCain further noted. "He was successful as a builder, an entrepreneur, and all that. But I don't think he has the fundamental underpinnings of principles and beliefs." 
McCain also suggested Trump's foreign policy is based in the world that was rather than the one that is, commenting "America First was the slogan of Henry Ford, Charles Lindbergh, and the isolationists of the 1930s. When you put it in the context of history, it's a throwback." 
The Arizona Senator has expressed that view in the past, and notably during the speech he gave when accepting the Liberty Medal in October, reports The Guardian.
He warned against succumbing to, "some half-baked, spurious nationalism cooked up by people who would rather find scapegoats than solve problems." McCain also urged Americans to, "continue in our just cause," noting, "We will not thrive in a world where our leadership and ideals are absent. We wouldn't deserve to." 
In an interview on 'The Chris Plante Show,' Trump was asked about McCain's remarks.
"People have to be careful because at some point I fight back," the president said. "You know, I'm being very nice. I'm being very, very nice. But at some point I fight back and it won't be pretty."