Gun control groups say Sens. Charles Schumer (N.Y.) and Joe Manchin (W.Va.) are watering down a bill that expands background checks on gun purchases.

The groups say the two Democratic senators are going too far in a bid to win Republican support for gun control legislation expected to hit the Senate floor next week.

“Everyone supports background checks except for NRA leadership,” said Josh Horwitz, executive director of the Coalition to Stop Gun Violence, one of the advocates alarmed by the changes Schumer and Manchin are suggesting.