Republican senators were appalled by President Trump’s rough treatment of 91-year-old Sen. Chuck Grassley (Iowa), the Senate’s most senior Republican, on social media and are pushing back on Trump’s attempts to squeeze the senator into abolishing an arcane procedure known as the Senate blue slip.

GOP senators were not pleased that Trump piled so much pressure on Grassley, the chair of the Senate Judiciary Committee, to get rid of a long-established Senate tradition. Trump piled on by reposting on Truth Social posts accusing Grassley of being a “RINO” and “sneaky” and standing in the way of Trump’s agenda.

Sen. Thom Tillis (R-N.C.), a member of the Senate Judiciary Committee who has separately felt the wrath of Trump for his opposition to the tax and spending megabill earlier this month, said Trump appears to be getting bad advice from his staff.

“I think it was a bad — No. 1, Chuck is beloved in our conference. No. 2, the blue-slip policy helps the president. He’s got staff giving him bad advice,” Tillis said.

He argued that keeping in place the tradition of allowing senators to use documents known as blue slips to block district-court level judicial nominees and U.S. attorney nominees has preserved an important element of bipartisanship in the Senate.

Tillis said getting rid of blue slips would make it even tougher to work with Democrats as Republicans attempt to move legislation that needs 60 votes to pass the Senate, such as the annual spending bills.

“I think the president’s staff have a bad habit of advising him that was a good idea,” Tillis said of Trump’s penchant of taking public shots at Republican allies in Congress when they disagree with him on an issue.

Trump blasted Tillis last month on Truth Social after the North Carolina senator announced he would vote against the One Big, Beautiful Bill Act because of more than $900 billion in cuts to Medicaid. Shortly after the interaction, Tillis said he would not be running for reelection next year.

Tillis said Trump’s staff either failed to........

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