Originally Posted by
CrazyOne
Just to further clarify, I've always considered Union Station to be the closest stop to the Capitol building.
It is, if you are on the Senate side. The closest stop to the House side is Capitol South on the Orange and Blue Lines, right next to the Cannon Building and across from the RNC. From there it would probably be easiest to take the Orange out to New Carrollton-- though not all trains stop at NCR-- than to backtrack on Metro to Union Station.