FEATURED:

Flake: It's not a joking matter to call someone treasonous

Sen. Jeff FlakeJeffrey (Jeff) Lane FlakeTrump boosts McSally, bashes Sinema in Arizona Watch live: Trump speaks at Arizona rally Mnuchin to attend anti-terror meeting in Saudi Arabia following Khashoggi disappearance MORE (R-Ariz.) on Sunday pushed back on the White House's characterization that President TrumpDonald John TrumpFive takeaways from Gillum and DeSantis’s first debate GOP warns economy will tank if Dems win Gorbachev calls Trump's withdrawal from arms treaty 'a mistake' MORE was joking when he called Democrats "treasonous" for not clapping at the State of the Union, saying the president's comments are not a joking matter. 

"I don't think it's a joking matter to say that somebody is treasonous, and he ought to stop it," Flake told NBC's Chuck Todd on "Meet the Press." 

ADVERTISEMENT

"Words matter," the Republican senator, who recently announced his retirement, said. "When he talks about fake news, for example, I gave another speech about how that gives aid and comfort to authoritarians around the world who are now labeling their opposition or dismissing real dissent as fake news.

"So these things matter." 

Flake has often criticized the president. Earlier this month, he ripped Trump after the president suggested it was treason for Democrats not to applaud during his State of the Union speech, saying the remarks were "not normal." 

"One who levels such a charge knows neither the meaning of treason nor the power that the words of a president carry. ... Our silence will also mark the day that we failed to recognize that this conduct in an American president is simply not normal," the senator said during a speech on the Senate floor. 

White House spokesman Hogan Gidley said the president's comments were "tongue-in-cheek."