A day after playing golf with the chairman of the UBS banking giant, President Barack Obama hit the links with an assistant White House chef during his Martha's Vineyard vacation. That's not to say Sam Kass is an ordinary cook. Kass is a former restaurant chef who has long cooked for the Obamas, preparing healthy meals for a busy family. And when the newly elected president and his wife, first lady Michelle Obama, moved from Chicago to Washington this past winter, they brought along Kass as an assistant to White House Executive Chef Cristeta Comerford. Kass was in Tuesday's foursome at the Mink Meadows course in Vineyard Haven. He was joined by Michael Ruemmler of the White House advance team and perennial Obama playing partner Marvin Nicholson, once an Augusta National caddie who now works as White House trip director. It doesn't sound like the duffer-in-chief is playing too well. On the second hole, a neighbor described Obama shooting - at best - a triple-bogey, or three over par.