Several GOP senators threw cold water on the idea of a last-minute immigration deal — some saying they simply have not seen any details of the purported Tillis-Sinema pact.

"I think until the Biden administration owns up to its responsibilities on the border, it's not possible to pass a immigration deal," said Sen. John Cornyn (R-Texas), a close ally of GOP leader Mitch McConnell. Sen. Chuck Grassley (R-Iowa) said that Republican support for any deal would be there "only if the border is secure."

Other senators said they were not privy to the details. Minority Whip John Thune (R-S.D.) said that he has not seen a "final deal," emphasizing the short time left before the new Congress begins. Sens. Rick Scott (R-Fla.), Lisa Murkowski (R-Alaska), Pat Toomey (R-Pa.), and Mike Rounds (R-S.D.) also said they have not seen a deal.