The filibuster effectively means 60 votes are usually required to take action in the Senate. But Senate majorities can make or change rules to get around it. In 2017, Republicans went "nuclear" on Supreme Court nominations and used reconciliation rules to pass tax cuts (but chose not to limit the scope of the Byrd Rule). New books by Molly Reynolds and James Wallner explain when Senate majority parties use procedures to get around the filibuster. Reynolds finds parties follow their electoral and policy preferences but Wallner finds that minority party threatened retaliation can deter change. Matt talks to both about the future prospects for the filibuster and the ways around it.