(WASHINGTON) — Majority Leader Mitch McConnell said Saturday he will delay consideration of health care legislation in the Senate, after Sen. John McCain’s announced absence following surgery left Republicans short of votes on their marquee legislation.

McConnell’s announcement amounted to another setback for GOP efforts, promoted by President Donald Trump, to repeal and replace “Obamacare” after years of promises. McConnell issued his statement not long after McCain’s office disclosed that he had undergone surgery to remove a blood clot from above his left eye, and had been advised by his doctors to stay in Arizona next week to recover.

With McConnell’s health care legislation already hanging by a thread in the Senate with no votes to spare, McCain’s absence meant it would become impossible for the majority leader to round up the votes needed to move forward with the bill next week as planned.

“While John is recovering, the Senate will continue our work on legislative items and nominations, and will defer consideration of the Better Care Act,” said McConnell, R-Ky. He did not say when he would aim to return to the health care bill.

Even before Saturday night’s developments, the fate of the health care legislation looked deeply uncertain in the Senate. In addition to two announced GOP “no” votes from moderate Susan Collins of Maine and conservative Rand Paul of…