Historical clue formulations

• Viet ___ (armed force of the 1960s-'70s) — 2023-01-09
• Capitol Hill org. — 2020-07-29
• D.C. body — 2018-01-27
• Viet ___ — 2014-12-14
• Viet ___ — 2013-11-27
• D.C. group — 2005-06-12
• Attached houses?: Abbr. — 1998-04-19
• Reps. and Sens. — 1994-04-22