Biden says Trump questioning European commitment to NATO is 'dumb,' 'un-American'

President Biden condemned former President Donald Trump as "un-American" after the GOP frontrunner encouraged Russia to do "whatever the hell they want" to NATO members that did not meet spending guidelines on defense.

Biden responded to the former president from the White House on Tuesday, calling the criticism of fellow NATO member nations "shameful" and "dumb."

"The former president has set a dangerous, and shockingly, frankly un-American signal to the world," Biden said at the White House on Tuesday.

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"When America gives its word, it means something. When we make a commitment, we keep it. And NATO’s a sacred commitment. Donald Trump looks at this as if it's a burden," the president continued.

Trump made the comments during a campaign speech Saturday in Conway, South Carolina.

The former U.S. president said "one of the presidents of a big country" once asked him whether the U.S. would still defend their country if they were invaded by Russia, even if they did not pay.

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"No, I would not protect you," Trump recalled telling that country's leader. "In fact, I would encourage them to do whatever the hell they want. You got to pay. You got to pay your bills."

NATO states that an attack on one member nation is an attack on all the nations in the alliance. Trump has previously taken issue with the smaller amount of money other NATO countries spend on defense compared with what the U.S. pays. He has also threatened multiple times in the past to withdraw the U.S. from NATO.

"The whole world heard it. The worst thing is, he means it," Biden