The Republicans' chance of retaking the Senate is about a quarter of what it was two months ago, according to the New York Times' great meta-pollster, Nate Silver. Despite Mitt Romney's comeback, Democratic Senate candidates like Florida incumbent Bill Nelson are also holding their own. Check the tables on Silver's blog at fivethirtyeight.com. Everything's getting tight.
Emblematic of Republicans’ problems is Florida, a state where Mr. Romney has made considerable gains in the polls and where their Senate candidate, Representative Connie Mack, had drawn nearly even this summer with the Democratic incumbent, Bill Nelson. But Mr. Mack fell behind in the polls in September, and two of the four polls published since the presidential debate had Mr. Nelson with a double-digit lead.