Adam Jentleson knows firsthand how powerful a tool the filibuster can be — and what’s possible without it. He was deputy chief of staff to former Nevada Sen. Harry Reid, who was majority leader in 2013 when Democrats exercised “the nuclear option,” eliminating the filibuster for presidential appointees.

Now, Jentleson and a growing number of Democrats argue Senate leaders should eliminate the filibuster for legislation, which would enable Democrats to pass major legislation with a simple Senate majority, instead of the current 60-vote threshold. Jentleson lays out his argument in a recent book, Kill Switch: The Rise of the Modern Senate and the Crippling of American Democracy.

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