National Review’s political reporter John

National Review’s political reporter John Miller provides the latest poll results for the key Senate races. Miller suggests that the Republicans need to win the three races he considers true “toss-ups” — Colorado, New Hampshire, and South Dakota — or win two of these three races and “come-from-behind” in Minnesota or Arkansas. If Lincoln Chafee switches parties, the Republicans must win all three of Miller’s toss-ups plus a come-from-behind race. And, of course, the Republicans must not suffer a come-from-behind defeat in Missouri, Texas, or elsewhere.