Congressional (adjective)

1. Relating to a congress, particularly the United States Congress.
2. Relating to or characteristic of a congress or legislative assembly.

Origin:

Mid 18th century: from congress, on the pattern of parliamentary.

Examples:

1. The bill passed the congressional vote.
2. The candidate is running for a congressional seat.
3. The congressional elections are coming up.
4. He has a lot of experience in congressional politics.
5. The congressional budget office released a report.