Because non-stop campaigning is tiresome.

Via Politico:

. . . This time, Obama saw no need to stay back in Washington, in part because the situation in Ukraine had cooled by that Friday. He told an aide that he’d be making the same calls to foreign leaders whether he was in the Situation Room or sunny Key Largo.

At a leisurely dinner with friends on that Saturday night, Obama expressed no regrets about the mini-vacation at the lush Ocean Reef Club resort or the publicity surrounding the trip, which reportedly required planes, five helicopters, more than 50 Secret Service agents and airspace restrictions over South Florida. After a difficult few weeks dealing with an international crisis, he relished the break, which included two rounds of golf.

“I needed this,” Obama told guests at his dinner party, including Mourning. “I needed the golf. I needed to laugh. I needed to spend time with friends.’’

Obama spent 46 days on the golf course in 2013, up from about 30 rounds during each of his first three years in office and 19 in 2012, according to a review of his schedule. There’s rarely a warm weekend when he hasn’t played this year, including blocking out his long Presidents’ Day weekend for the second year in a row to golf with his high school friends.

By contrast, he hasn’t left the White House since November to play basketball, a game central to his routine in the early days. Obama used to play off-campus at least once a month. Although he’ll still shoot hoops on the grounds, he doesn’t do it as often as he once did, the casualty of one too many aches and injuries.