WASHINGTON — Republican Sen. John McCain is returning home to Arizona after being hospitalized for the side effects of his brain cancer treatment and likely will miss a crucial vote on the GOP tax package, President Donald Trump said Sunday. Trump told reporters he had spoken to McCain’s wife, Cindy, after her husband had spent about a week at Walter Reed National Military Medical Center in Maryland. “They’ve headed back, but I understand he’ll come if we ever needed his vote, which hopefully we won’t,” Trump said after returning to the White House from Camp David.