But several Republicans balked anyway, and party leaders were forced to spend hours scrounging for the votes. It was an awkward turn for Republicans, who had hoped to use the debt limit drama to score political points against Democrats but ended up bitterly divided themselves.
“I don’t understand why we are folding here,” Senator Lindsey Graham, Republican of South Carolina, said on Thursday. “This is just a mistake.”
Democrats pointed to Mr. McConnell’s move as evidence that Republicans could — and should — at least allow them to raise the debt limit through normal procedures.
In a speech on Thursday that angered many Republicans, Senator Chuck Schumer of New York, the majority leader, declared victory.
“Today’s vote is proof positive that the debt limit can be addressed without going through reconciliation process — just as Democrats have been saying for months,” Mr. Schumer said. “The solution is for Republicans to either join us in raising the debt limit, or stand out of the way and let Democrats address the debt limit ourselves.”
Mr. McConnell seized on Mr. Schumer’s comments in his letter, calling it a “partisan, angry and corrosive” speech and yet another reason to withhold Republican votes in the coming months.
“This childish behavior only further alienated the Republican members who helped facilitate this short-term patch,” Mr. McConnell wrote. “It has poisoned the well even further.”