The five-term senator from Pennsylvania faces dipping polls and now, a Democratic primary contender in Rep. Joe Sestak.
By the end of July, it should be clear whether his top legislative initiatives – healthcare reform and climate-change legislation – are on track.
The justices' inaction this term probably extends the 13 detainees' time at Guantánamo.
California considers expanding data on its state forms to allow for multiple answers under race.
An Iranian company is the first to be penalized as the US uses stricter financial sanctions to curb Pyongyang's weapons program.
Cities in Texas, North Carolina, and California dominated the top 10 list of fastest-growing US cities in 2008.