WASHINGTON - Democratic Sen. Barack Obama (news, bio, voting record) is asking whether he can take money from donors who want him to be president, then give it back later. The Federal Election Commission said Wednesday that it will look into the novel question. Obama is indicating that he wants to at least keep the option of using the public financing system for his presidential campaign if he becomes the Democratic nominee. To do so, the Illinois senator could not spend any money from contributors for political purposes, but instead use federal funding that is expected to total about $85...