The race for control of the U.S. Senate is heading toward the home stretch and after almost all the primaries have been held, both Republicans and Democrats have a case to be made that they have a good shot at ending up with a majority of the upper chamber. Reading the tea leaves this election is especially difficult. Sabato’s Crystal Ball rates the battle for Senate control a tossup. Others think the Republicans have a one or two-seat edge. Even in a “red wave” election, winning the Senate is going to be an uphill battle for Republicans. Of the 35...