House Speaker Paul Ryan Paul Davis RyanKenosha will be a good bellwether in 2020 At indoor rally, Pence says election runs through Wisconsin Juan Williams: Breaking down the debates MORE (R-Wis.) said Sunday that President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE should let special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE carry out his investigation into Russian meddling in the 2016 election.

“As the Speaker has always said, Mr. Mueller and his team should be able to do their job,” AshLee Strong, a spokeswoman for Ryan, said in a statement issued Sunday.

She did not comment on whether Congress should take up legislation to protect Mueller, CNN reported.

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Ryan joins a number of key Republicans that have warned Trump not to interfere with Mueller’s investigation.

On Sunday morning Trump attacked the makeup of Mueller’s team, arguing that it had a lot of Democrats but no Republicans.

Why does the Mueller team have 13 hardened Democrats, some big Crooked Hillary supporters, and Zero Republicans? Another Dem recently added...does anyone think this is fair? And yet, there is NO COLLUSION! — Donald J. Trump (@realDonaldTrump) March 18, 2018

The previous day he said the Mueller probe should never have started and characterized it as a “witch hunt.”

The Mueller probe should never have been started in that there was no collusion and there was no crime. It was based on fraudulent activities and a Fake Dossier paid for by Crooked Hillary and the DNC, and improperly used in FISA COURT for surveillance of my campaign. WITCH HUNT! — Donald J. Trump (@realDonaldTrump) March 17, 2018

That same day, Trump’s personal lawyer said that Deputy Attorney General Rod Rosenstein Rod RosensteinDOJ kept investigators from completing probe of Trump ties to Russia: report Five takeaways from final Senate Intel Russia report FBI officials hid copies of Russia probe documents fearing Trump interference: book MORE should end the Mueller investigation. He later said he was speaking in a personal capacity and not for the president.

Sen. Jeff Flake Jeffrey (Jeff) Lane FlakeJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Republican former Michigan governor says he's voting for Biden Maybe they just don't like cowboys: The president is successful, some just don't like his style MORE (R-Ariz.) told CNN’s “State of the Union” on Sunday that he thinks Trump is moving closer to firing Mueller and that he expects Republicans to push back against any effort by Trump to end the investigation.

Sen. Lindsey Graham Lindsey Olin GrahamMcConnell locks down key GOP votes in Supreme Court fight Will Republicans' rank hypocrisy hinder their rush to replace Ginsburg? Momentum growing among Republicans for Supreme Court vote before Election Day MORE (R-S.C.) echoed Flake, saying that if Trump tried to fire Mueller, “that would be the beginning of the end of his presidency.”

Democrats have said Congress should act to protect Mueller. Senate Minority Leader Charles Schumer Chuck SchumerRepublican senator says plans to confirm justice before election 'completely consistent with the precedent' Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral Graham signals support for confirming a Supreme Court nominee this year MORE (D-N.Y.) said that Republicans must declare firing Mueller a “red line.”

Trump reportedly tried to fire Mueller last year but was stopped when the White House counsel said he would quit if Trump got rid of Mueller.

The White House has said they do not have plans to fire Mueller and are cooperating with his investigation.