(Phoenix, AZ) -- U.S. Senator John McCain is in physical therapy. McCain's former chief of staff and longtime co-author Mark Salter made the announcement over the weekend. Salter went on CBS's "Face the Nation" to promote McCain's new book, and said the Republican is doing all right and is staying engaged with his staff. He went on to say that he keeps up with current events by watching the news. McCain is currently battling a deadly brain cancer.
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