But the president refused to go into details about the conversations, insisting they were “private.”
“And by the way all of them have, with one exception, picked up the phone and called me as well,” said Mr Biden to laughs from the audience in Milwaukee.
Mr Biden gave Mr Cooper a broad grin as the new channel host also chuckled at the line.
But the president did refer to Mr Trump by name on several occasions during the live town hall event, his first since his January inauguration.
When Mr Cooper asked the president for his thoughts on Mr Trump’s acquittal at his senate impeachment, Mr Biden refused to take the bait.
“For four years all that has been in the news is Trump. The next four years I want to make sure that all the news is about the American people,” said Mr Biden.
“I’m tired of talking about Trump. It’s done.”
On a second occasion the president found himself talking about ways to help small businesses and again found himself veering towards the topic of Mr Trump.
“I’m tired of talking about Donald Trump. I don’t want to talk about him anymore.”
And during a discussion of the pandemic and opening the economy back up, he even referred to Mr Trump as “the former guy.”