Sen. John McCain panned the well-off Americans who dodged being drafted in the Vietnam War because they had a bone spur -- the very same health condition by which President Trump says he received his fifth deferment.

"One aspect of the conflict by the way that I will never ever countenance is that we drafted the lowest income level of America and the highest income level found a doctor that would say that they had a bone spur," McCain, R-Ariz., said on C-SPAN3, American History TV. "That is wrong. That is wrong. If we are going to ask every American to serve, every American should serve."

Trump, a wealthy businessman who grew up in a well-off family, received five draft deferments during the Vietnam War, the first four being for college and the fifth for heel spurs.

Trump and McCain have frequently quarreled, during both the 2016 campaign and Trump's time in the White House.

McCain, who served in the Navy, was mocked by Trump in 2015 because he a prisoner of war for five years during the Vietnam War. "I like people who weren't captured," Trump said.