As he entered the Capitol on Tuesday, President Donald Trump was greeted by a protester who shouted, "Trump is treason!" and hurled small Russian flags at the president
President Trump in the Senate
Credit: CQ Roll Call/AP

After spending the early hours of Tuesday feuding with Republican Sen. Bob Corker on Twitter, President Donald Trump capped off his morning with even more drama as he joined GOP senators for a policy lunch meeting on Capitol Hill.

As he entered the Capitol with Senate Majority Leader Mitch McConnell, Trump was greeted by protesters — including one who shouted, “Trump is treason!” and hurled small Russian flags at the president.

According to a White House pool report, the protester was later identified as Ryan Clayton, the leader of the anti-Trump group Americans Take Action. Clayton staged a similar stunt during this year’s Conservative Political Action Conference in February, where he fooled unwitting attendees into waving Russian flags bearing Trump’s name.

Clayton, 36, was reportedly arrested for unlawful conduct on Thursday for protesting inside the U.S. Capitol, ABC News’ Dan Linden later reported in a tweet.

The moment came as many were anticipating theatrics of a different sort — between Trump and Corker.

That apparently included Republican Sen. Thom Tillis, who showed up to the luncheon carrying a bag of popcorn.

The senator tweeted a photo of himself serving up said popcorn, captioning it, “Ready for lunch with POTUS and @SenateGOP.”

Though Corker attended the lunch with Trump, the senator told reporters that their ongoing battle didn’t come up, and added that he only talks to Trump through the press.

And for Sen. John McCain, what happened in the lunch stayed in the lunch. The New York TimesSheryl Gay Stolberg tweeted: “Sen. John McCain was uncharacteristically mum on GOP Senate lunch with @POTUS.”

Asked how it went, Stolberg says McCain responded: “Excellent and I’m not going to talk about it.”