Dr. Mark Gilbert, chief of neuro-oncology at the National Institutes of Health's National Cancer Institute, released a statement Sunday saying McCain “continues to improve” after being treated for a viral infection. He added the senator is also responding positively to his ongoing cancer treatment.
McCain's office released a statement Sunday night: "Senator McCain has returned to Arizona and will undergo physical therapy and rehabilitation at Mayo Clinic. He is grateful for the excellent care he continues to receive, and appreciates the outpouring of support from people all over the country. He looks forward to returning to Washington in January."
McCain was admitted into the hospital on Wednesday after missing a third straight day of votes in the Senate.
The final vote on the Republican tax bill is expected to take place early this week.
The passage of the tax bill, however, does not hinge on McCain's support because the GOP has a 52-48 vote advantage in the Senate. Vice President Mike Pence can also cast a tie-breaking vote, should it be needed.