Republican senators reportedly ganged up on Sen. Mike Lee (R-UT) at a closed-door Republican lunch Wednesday over his push to keep the Senate in session until a voter ID bill passes.

Sens. John Cornyn (R-TX) and John Kennedy (R-LA) led what one source described to Punchbowl News reporter Andrew Desiderio as a "pile-on" against the Utah Republican during the closed-door lunch meeting.

Cornyn and Kennedy challenged Lee on his strategy for passing the Safeguard American Voter Eligibility Act. They complained that President Donald Trump was being led to believe the Senate could pass it — fueling what Desiderio described as Republicans attacking each other and Trump undermining his own agenda.

"Mike, I am a co-sponsor and have repeatedly voted for this but you don't have the votes," Cornyn wrote, tagging Majority Leader John Thune (R-SD). "Try focusing on Democrats instead of Republicans. Republican on Republican attacks are hurting our chances to win the majority in November."