Possible Clues:

• Channel for political junkies
• D.C. affairs broadcaster
• Filibuster-airing channel
• TV political network
• 'Gavel-to-gavel' broadcaster, and a hint to six long answers in this puzzle
• ''Prime Minister's Questions'' airer
• "Your Unfiltered View of Government" sloganeer
• It covers the floor
• Senate hearing airer
• ''Where History Unfolds Daily''