Obama was supposed to play basketball with Congressman John Yarmuth and others at 7 a.m. then have an invitation-only chat with a group of nurses. But a release from Obama's campaign says he's headed back to Washington to vote on some bills in the U.S. Senate. Hillary Clinton and John McCain may be doing the same. Two of the pieces of legislation on the Senate's agenda include suspending input into the Strategic Petroleum Reserve and a collective bargaining bill for police officers.