President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE on Tuesday offered what appeared to be a tongue-in-cheek defense of his criticism of former Vice President Joe Biden Joe BidenBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Democratic groups using Bloomberg money to launch M in Spanish language ads in Florida Harris faces pivotal moment with Supreme Court battle MORE while traveling in Japan, which triggered bipartisan blowback against the president.

“I was actually sticking up for Sleepy Joe Biden while on foreign soil. Kim Jong Un Kim Jong UnSatellite images indicate North Korea preparing for massive military parade South Korea warns of underwater missile test launch by North Korea Trump says he didn't share classified information following Woodward book MORE called him a ‘low IQ idiot,’ and many other things, whereas I related the quote of Chairman Kim as a much softer “low IQ individual.’ Who could possibly be upset with that?” the president tweeted.

I was actually sticking up for Sleepy Joe Biden while on foreign soil. Kim Jong Un called him a “low IQ idiot,” and many other things, whereas I related the quote of Chairman Kim as a much softer “low IQ individual.” Who could possibly be upset with that? — Donald J. Trump (@realDonaldTrump) May 28, 2019

Trump appeared to be responding to Biden’s presidential campaign, which earlier Tuesday blasted the president for agreeing with the North Korean leader’s criticism of his potential 2020 White House rival as having a “low IQ.”

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Biden campaign official Kate Bedingfield called Trump’s attacks “beneath the dignity of the office” and said “to be on foreign soil, on Memorial Day, and to side repeatedly with a murderous dictator against a fellow American and former vice president speaks for itself.”

Trump has repeatedly hammered Biden as the former vice president has solidified his position at the top of the Democratic presidential primary field. But Trump's latest comments drew pointed criticism because he made them while overseas, his latest violation of the norm that domestic politics stop at the water’s edge.

“Kim Jong Un made a statement that Joe Biden is a low-IQ individual. He probably is, based on his record. I think I agree with him on that,” Trump said during a press conference with Japanese Prime Minister Shinzo Abe.

Trump first stated his agreement with Kim’s attack on Biden in a Saturday tweet in which he brushed aside North Korea’s short-range missile test that was condemned by the U.S. and its allies.

“North Korea fired off some small weapons, which disturbed some of my people, and others, but not me. I have confidence that Chairman Kim will keep his promise to me, & also smiled when he called Swampman Joe Biden a low IQ individual, & worse. Perhaps that’s sending me a signal?” Trump tweeted.