Yesterday, President Barack Obama announced his plans to run for reelection in 2012, 582 days before Election Day and before most major Republican opponents officially announced that they’d be entering the race. This is the earliest any incumbent president has officially signed up to run again.

President George W. Bush filed for reelection on May 17, 2003. Several Democratic challengers had announced their intention to run months before, for a general election in November 2004.