Former Secretary of State John KerryJohn Forbes KerryJohn Kerry: Pressley's story 'more American than any mantle this president could ever claim' Schumer to donate Epstein campaign contributions to groups fighting sexual violence Trump threatens Iran with increased sanctions after country exceeds uranium enrichment cap MORE had a simple message for President TrumpDonald John TrumpUS-Saudi Arabia policy needs a dose of 'realpolitik' Trump talks to Swedish leader about rapper A$AP Rocky, offers to vouch for his bail Matt Gaetz ahead of Mueller hearing: 'We are going to reelect the president' MORE on Tuesday, saying he should “resign.”

Kerry was speaking on a discussion panel at the World Economic Forum in Davos, Switzerland, when he was asked what his message to Trump would be, according to CNBC.

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Kerry was at first hesitant to answer the question, saying Trump "doesn't take any of this seriously.”

“He doesn’t have an ability to have that kind of conversation,” Kerry said after debating whether to answer or not.

He ultimately responded directly to the question, which prompted laughter and clapping from the audience.

Trump was also supposed to be in Davos this week for the forum, but canceled the trip due to the ongoing partial government shutdown that is now in its second month.

The president once again lashed out at the media over the event in a Tuesday morning tweet. 

"Last time I went to Davos, the Fake News said I should not go there," he wrote. "This year, because of the Shutdown, I decided not to go, and the Fake News said I should be there. The fact is that the people understand the media better than the media understands them!"