Democratic presidential candidate Joe BidenJoe BidenHouse clears bill to provide veterans with cost-of-living adjustment On The Money — Dems dare GOP to vote for shutdown, default To reduce poverty, stop burdening the poor: What Joe Manchin gets wrong about the child tax credit MORE expressed surprise after he learned that President TrumpDonald TrumpTrump takes shot at new GOP candidate in Ohio over Cleveland nickname GOP political operatives indicted over illegal campaign contribution from Russian national in 2016 On The Money — Dems dare GOP to vote for shutdown, default MORE was thinking about attending Russia's May Day event next year.
After being told the news by a reporter, Biden said "Are you serious?" according to a clip posted Saturday by CNN.
"You're kidding me," the former vice president added. "Are you joking?"
Trump indicated Friday that he would like to accept Russian President Vladimir Putin's invitation to the May Day Parade in Moscow, but said he might not because it is during the presidential campaign season.
“It’s a very big deal, celebrating the end of the war,” Trump told reporters. “I appreciate the invitation. It’s right in the middle of the political season.”
White House hopeful Kamala HarrisKamala HarrisCIA chief team member reported Havana syndrome symptoms during trip to India: report Harris booked for first in-studio talk show appearance as VP on 'The View' Republicans caught in California's recall trap MORE (D-Calif.) also jabbed at Trump over the matter, tweeting, "Always nice to spend time with supporters on the campaign trail."
Trump has faced scrutiny over his relationship with Russia, including after he said it was "possible" he would invite Putin to next year's Group of Seven summit.
The Justice Department's investigation into Russian interference in the 2016 election also found that Russia aimed to help Trump win the contest, but did not establish that the Trump campaign conspired with Moscow.