WASHINGTON (AP) — The Senate delayed a highly anticipated vote this coming week to repeal and replace the nation's health care law after Sen. John McCain's announced absence due to surgery, an enormous setback as time dwindles for Republicans to pass the signature legislation after years of promises.

The decision by Senate Majority Leader Mitch McConnell late Saturday came not long after McCain's office disclosed that he had undergone surgery to remove a blood clot from above his left eye. He's expected to be out for the week, recovering in Arizona.

Adding to the uncertainty, the Congressional...