Sen. John McCain will be spending a week in his home state of Arizona recovering from a procedure to remove a blood clot from above his left eye on Friday, leading to a delay in an expected showdown in the Senate on the Republican healthcare plan.

Mayo Clinic Hospital in Phoenix said in a statement Saturday, shared by McCain's office, that "[s]urgeons successfully removed the 5-cm blood clot during a minimally invasive craniotomy with an eyebrow incision. Tissue pathology reports are pending within the next several days."

The clinic added that McCain, who is 80 years old, is now "resting comfortably at home and is in good condition," after a successful surgery. Pathology information is not yet available, and the clinic said it will not be conducting interviews for the time being.

McCain's office also put out a statement praising the treatment the Republican senator received.

"Senator McCain received excellent treatment at Mayo Clinic Hospital in Phoenix, and appreciates the tremendous professionalism and care by its doctors and staff. He is in good spirits and recovering comfortably at home with his family. On the advice of his doctors, Senator McCain will be recovering in Arizona next week," the statement said.

Senate Majority Leader Mitch McConnell later put out a statement to say that the Senate will defer consideration of the GOP healthcare plan until McCain returns to work.

McCain's operation comes at an inopportune time for the Senate Republican leadership, which was hoping to bring a motion-to-proceed vote for their plan to repeal and replace parts of Obamacare to the floor early next week. Fifty votes are needed to pass the bill, but already Sens. Susan Collins of Maine and Rand Paul of Kentucky say oppose the latest draft. The effort will fail if one more GOP senator comes out against it. Without McCain, only 49 senators would vote in favor as it stands now.

McCain's fellow Republican senator from Arizona, Jeff Flake, tweeted Saturday evening that he hopes to see McCain back at work soon.

"[McCain] is the most tenacious and resilient man I know," he said.