Why Democrats Are Likely to Keep the Senate: A Look at the Key Races

Republican face a challenging map, made even harder by candidates like Richard Mourdock and Todd Akin.

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Josh Mandel (left) and Senator Sherrod Brown debate in Cleveland on October 15. (Tony Dejak/Associated Press)

Even as the presidential race heads toward a photo finish, control of both houses of Congress is looking easier to predict than ever. Democrats' chances of retaking control of the House were always slim and now, despite Nancy Pelosi's many protestations to the contrary, it seems they've managed to squander what little shot they had. On the Senate side, meanwhile, Republicans' hopes for taking control seem almost as dim. Though the GOP needs a net pick-up of just four seats for a majority, that no longer looks likely. The reasons vary: some GOP candidates have run unexpectedly poor or gaffe-prone campaigns; some Democratic candidates have overperformed; and of course, unusual local factors have swung some races.

The GOP looks likely to pick up seats in Nebraska, North Dakota, and Montana; they could win in Wisconsin, too. But it would take victories in all four to take control of the Senate, assuming they also did not lose any seats. Democrats, however, seem to have a good chance at picking up Massachusetts, while Maine independent Angus King, who's headed for victory, is expected to caucus with Democrats. The party is well-situated to hold most of its other seats, and Indiana and Arizona aren't out of the question as pick-ups.

Here's a look at the major battlefields:

Looking Good for Democrats

1. Ohio: Senator Sherrod Brown (D) vs. Josh Mandel (R): Early this year, the freshfaced Mandel (he commonly makes jokes on the stump about hoping to shave someday) was touted as the next Marco Rubio -- a young, charismatic Republican who was headed for the Senate. But Mandel has struggled, weighed down by a seeming lack of knowledge on many policy details, questions about his ethics both as state treasurer and as candidate, and his own gaffe-prone demeanor. The race has also seen high outside spending on both sides. Nonetheless, Brown has maintained a lead -- never huge, but consistent -- and seems poised to win a second term.

2. Massachusetts: Senator Scott Brown (R) vs. Elizabeth Warren (D): Although it took her some time to find her footing -- especially given early stumbles over her debunked Native American heritage -- the populist hero and Harvard professor seems to have gotten into a groove. Brown is an incumbent (though not a regular one, as he's only served two years of Ted Kennedy's unexpired term) and has sensibly run to the center. But he faces the same challenging landscape of any Republican running the nation's bluest state. Most polls have given Warren a solid lead in the upper single digits -- although a Boston Globe poll released Monday may give her pause, as it shows the race tied. The pair's final debate, scheduled for Tuesday, was canceled due to Hurricane Sandy.

3. Virginia: Tim Kaine (D) vs. George Allen (R): In the face-off between two former governors, Kaine seems to be have the edge on Allen, who is trying to recapture the seat he lost to Senator Jim Webb six years ago; Webb is retiring after just one term. Interestingly, Kaine has tied himself to the president, whose fortunes in the state look dimmer than they did a month or two ago. Presidential coattails could be a deciding factor in the race.

4. Connecticut: Chris Murphy (D) vs. Linda McMahon (R): On her second attempt at a Senate seat in two years, McMahon -- former CEO of World Wrestling Entertainment -- has outspent Murphy, a congressman, five to one, and the polls show she's closer than she was in her race against Senator Richard Blumenthal. But she still trails in every poll, and is unlikely to reverse that trend before Election Day, especially in a Democratic state. Senator Joe Lieberman, an independent who caucuses with Democrats, is retiring.

Presented by

David A. Graham is a senior associate editor at The Atlantic, where he oversees the Politics Channel. He previously reported for Newsweek, The Wall Street Journal, and The National.

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