[andyv]

In the US, "Congress" is both the House of Representatives and the Senate, not just the House.

[iaw]

The House of Representatives is often colloquially referred to as "congress" don't ask me why even though that's the name of the bicameral body.

[gremlinsinc]

I think it's because ... reps are called congressmen/women, senators in the senate are well, called senators...