Washington Photo Blog: Tuesday, Apr. 22, 2008

A microphone waits for Barack Obama to address supporters after ending a one day train tour with a rally at the state capitol in Harrisburg, Pennsylvania.
Callie Shell / Aurora for TIME

On the Stump

A microphone waits for Barack Obama to address supporters after ending a one day train tour with a rally in Harrisburg, Pennsylvania.

The Washington photo blog is an intimate look at life inside the Beltway and beyond.