GOP senator warns Trump: Panel won't take up attorney general nominee this year
© Greg Nash

Sen. Chuck GrassleyCharles (Chuck) Ernest GrassleyHigh stakes as Trump, Dems open drug price talks Senate approves border bill that prevents shutdown Grassley raises voice after McConnell interrupts Senate speech MORE (R-Iowa) sent a warning shot to the White House on Wednesday night, saying he wouldn't take up the nomination of any potential successor to Attorney General Jeff SessionsJefferson (Jeff) Beauregard SessionsThe Hill's Morning Report — Presented by the American Academy of HIV Medicine — Trump, Congress prepare for new border wall fight The Memo: Trump and McCabe go to war McCabe book: Sessions once said FBI was better off when it 'only hired Irishmen' MORE this year. 

"Everybody in D.C. [should be] warned that the agenda for the Judiciary Committee is set for rest of 2017. Judges first subcabinet 2nd / AG no way," Grassley said in a tweet on Wednesday evening.  

Grassley is the chairman of the Judiciary Committee and served with Sessions on the panel. He could effectively block any attorney general nominee from getting a hearing or a vote if Sessions were to be fired or step down — which he has not said he would do.

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His comments come as Trump has intensified his public criticism of Sessions, a former senator and his first supporter in the upper chamber.

In the most recent morning tweet storm venting his frustration with the attorney general, he questioned why Sessions hasn't replaced acting FBI Director Andrew McCabe.

Trump has also privately discussed using a recess appointment to try to name Sessions's successor without having to get congressional approval, according to The Washington Post. A White House official told the Post that action isn't "imminent." 

Congressional Democrats have pledged they will block such a move by forcing the Senate to hold pro-forma sessions, which would stymie any attempts by Trump to make a recess appointment. 

Senate Republicans, who have a large amount of respect for Sessions, have publicly backed their former colleague in his ongoing feud with Trump and publicly downplayed the chances that the president fires him. 

Sen. John CornynJohn CornynPoll shows competitive matchup if O’Rourke ran for Senate again On The Money: Trump declares emergency at border | Braces for legal fight | Move divides GOP | Trump signs border deal to avoid shutdown | Winners, losers from spending fight | US, China trade talks to resume next week How the border deal came together MORE (Texas), the No. 2 Senate Republican, said earlier Wednesday that Trump and Sessions needed to "sit down and work it out." 

"Well, it's the president's prerogative, but he's then going to jeopardize, potentially, his ability to get anything else done here. And I don't think that should be his desire or productive," Cornyn added to NBC News