Senate Armed Services Committee Chairman Carl LevinCarl Milton LevinMichigan to pay 0M to victims of Flint water crisis Unintended consequences of killing the filibuster Inspector general independence must be a bipartisan priority in 2020 MORE said Tuesday's failed cloture vote on a military policy bill has strengthened Democratic hopes to change the chamber's filibuster rules next year.

Levin said the 56-43 vote on a Defense Department authorization bill should have passed even though Republicans blocked it.

"I don't think a filibuster before has ever prevented the Senate from getting to a defense authorization," Levin said. "These filibusters on motions to proceed cannot be allowed to prevent us from getting our work done."

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Democratic Conference Vice Chairman Charles SchumerChuck SchumerTrump to lift Sudan terror sponsor designation Ocasio-Cortez, progressives call on Senate not to confirm lobbyists or executives to future administration posts The 2016 and 2020 Senate votes are about the same thing: constitutionalist judges MORE (N.Y.) held a Rules Committee hearing Wednesday on ideas to change the Senate's filibuster rules. The hearing - the committee's fifth on the topic - featured Sen. Tom HarkinThomas (Tom) Richard HarkinThe Memo: Trump attacks on Harris risk backfiring Ernst challenges Greenfield to six debates in Iowa Senate race Biden unveils disability rights plan: 'Your voices must be heard' MORE (D-Iowa), who has been pushing for filibuster reform since 1995.

Levin said Tuesday's vote was "a very powerful argument for why we should change the rules."

"I believe in protecting the rights of the minority party, but the problem is that the Republicans have nee using the rules to prevent any debate... That's something I hope we can change one way or another."