D or R > X or Y: Party Trumps Sex in the Contemporary Congress When Republican Senator Susan Collins took to the Senate floor last week to announce whether she would vote to confirm Brett Kavanaugh to the Supreme Court, Democrats and Republicans alike held their breath. Collins’s vote would be pivotal; it would determine whether one of the most controversial Supreme Court nominees of all time would receive a lifetime appointment.It wasn’t the first time Collins found herself in the spotlight. One of the few remaining moderates in an…