President Trump and Senate Majority Leader Mitch McConnell (R-Ky.) are pressing for an ambitious timeline to complete the bill, although it is being drafted in the Senate with little assistance from the White House.

The push has been laden with secrecy — and rank-and-file Republican senators are increasingly frustrated that McConnell and a small group of GOP aides are crafting a bill behind closed doors.

“My primary concern is writing a bill and not having enough time to analyze it,” Sen. Ron Johnson (R-Wis.) said in an interview this week. “I don’t want to get jammed.” Asked to describe his concerns with the process, Johnson quipped, “How much time do you have?”