Sen. Brian Schatz Brian Emanuel SchatzVideo of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral Democrat on Graham video urging people to 'use my words against me': 'Done' Polls show trust in scientific, political institutions eroding MORE (D-Hawaii) said Tuesday that some of his colleagues are rethinking their support for CIA Director Mike Pompeo Michael (Mike) Richard PompeoUS reimposes UN sanctions on Iran amid increasing tensions Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Trump steps up Iran fight in final election stretch MORE, who has been picked by 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 to be the next secretary of State.

“I think there are a number of us who voted for him last time who are actively reconsidering based on his service in the administration,” Schatz told The Washington Post.

“A lot of us gave him the benefit of the doubt. We were told he was going to handle everything on the level and be nonpolitical,” the Hawaii Democrat added. “And it’s not clear that that’s his record at the CIA.”

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Trump announced on Tuesday morning that Secretary of State Rex Tillerson Rex Wayne TillersonGary Cohn: 'I haven't made up my mind' on vote for president in November Kushner says 'Alice in Wonderland' describes Trump presidency: Woodward book Conspicuous by their absence from the Republican Convention MORE would be stepping down and Pompeo would be taking over his post.

Fourteen Democrats supported Pompeo when the Senate voted to approve his nomination to run the CIA in early 2017.

Senate Foreign Relations Committee Chairman Bob Corker Robert (Bob) Phillips CorkerHas Congress captured Russia policy? Tennessee primary battle turns nasty for Republicans Cheney clashes with Trump MORE (R-Tenn.) said on Tuesday that his panel is planning to hold a hearing next month for CIA Director Mike Pompeo's nomination to lead the State Department.

“I had a very good conversation with Director Pompeo this morning and look forward to meeting with him soon. As I shared with the president, the committee will consider his nomination as expeditiously as possible," Corker said in a statement.

The nomination process for Pompeo could be drawn out, however, according to the Post, which cited leaders of both parties.

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The predicted Democratic opposition — on top of the current backlog of nominations in the Senate — could leave the State Department without a leader while the U.S. is preparing to negotiate with North Korea and make changes to the Iran nuclear deal, among other pressing international concerns, the newspaper noted.

Pompeo — who holds views similar to President Trump concerning Iran — might not be confirmed before May 12, when the next round of sanction waivers against Iran are set to be signed, it added.

Trump has threatened to refuse to sign the waivers if France, Germany and the U.K. don’t change the deal to his liking.

Trump’s meeting with North Korean leader Kim Jong Un is also expected to take place in May.