While recent polling shows that Senate candidate John Fetterman is leading his Republican opponent, voter registration data indicates that the Democrat should not count Dr. Mehmet Oz out of the race just yet. On May 17, the day of the Pennsylvania primary elections, there were 4,000,436 registered Democrats and 3,450,289 registered Republicans in the state. As of August 29, a little more than three months later, there were 4,001,568 registered Democrats and 3,461,215 registered Republicans. While Pennsylvania still currently has more registered Democrats than Republicans, more than nine times more Republicans than Democrats were added in the period between the...