Senate Minority Leader Mitch McConnell says his Democratic counterpart is leading the chamber down a “disturbing” and “embarrassing” path, as Republican lawmakers’ frustration over what they consider a hardline stance on GOP amendments boils over.

“This institution has been fundamentally changed by one man, the majority leader, who has the ability to impose a gag rule on all the rest of us,” McConnell, R-Ky., told reporters Tuesday. “It’s a disturbing thing.”