That leaves Republicans needing to win at least three of the seven closely contested races for seats now held by Democrats, while holding off Grimes and Nunn in Kentucky and Georgia. If either of them wins in November, the task for Republicans will be more difficult. "It's moving a little in the Republican direction," said Larry Sabato of the University of Virginia. His Crystal Ball website rates the Senate as a toss-up. "Republicans will pick up Senate seats, probably three or four. The question is, will they get that wave in October that carries them to the six they need?&...