WASHINGTON (AP)-- A pickup game of basketball last spring brought good luck to the University of North Carolina's basketball team and to Barack Obama, the president said Monday as he welcomed the national champions to the White House. North Carolina won the title this year. And Obama, who scrimmaged with the players during a campaign visit to Chapel Hill, N.C., won the state's Democratic primary and then carried North Carolina in November as he captured the presidency. "I'm not sure whose luck rubbed off on who," Obama said Monday as he greeted the team on the White House's South Lawn. "I think there was just a good vibe going on there."