Washington (CNN) President Donald Trump on Tuesday embraced a line of defense offered by his attorney, Rudy Giuliani, that "collusion is not a crime," even though he continued to deny any alleged ties between his campaign and Moscow during the 2016 election.

"Collusion is not a crime, but that doesn't matter because there was No Collusion (except by Crooked Hillary and the Democrats)!" Trump tweeted.

Collusion is not a crime, but that doesn't matter because there was No Collusion (except by Crooked Hillary and the Democrats)! — Donald J. Trump (@realDonaldTrump) July 31, 2018

For months, Trump has insisted that there was "no collusion," but his Tuesday morning tweet hints at a potential expansion of his defense amid the ongoing special counsel investigation. Speaking to CNN's "New Day" on Monday, Giuliani said he wasn't sure if collusion was a crime

The President has repeatedly denied that there was any collusion between his campaign and Moscow, and he told The New York Times in December that "collusion is not a crime."

Legal experts, however, have repeatedly said that anyone found collaborating with Russia on the 2016 election could be charged with other crimes, such as conspiracy, and special counsel Robert Mueller's investigation has not concluded.

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