Imagine, for a moment, what 2009 would have looked like if the Senate’s Democratic supermajority showed up for its first day of work and immediately nuked the filibuster.
In such a world, the White House didn’t have to beg Republican senators for the votes it needed to enact President Barack Obama’s stimulus package. Though Democrats eventually achieved a 60-vote supermajority in the 111th Congress, it was only after Pennsylvania Sen. Arlen Specter switched parties...