In addition, both Ryan and McCarthy insist that riders proposed by both parties will be part of the omnibus bill, defying Democratic warnings that more controversial policy provisions would be “poison pills” and spark a confrontation with President Obama.

Still, while McCarthy on Monday promised a vigorous debate over funding for national security, Planned Parenthood and other issues, Scalise urged Republicans to stick together so the GOP emerges from the fight stronger.

“The story of a bill that passed with 150 Republican votes is much more positive and assertive than the story of a bill that passes with 79 Republican votes,” Scalise wrote in his letter.

“My point is simple: if there are 150 Republicans who hope the bill passes, then there should be 150 Republicans who vote yes on final passage.”