The Senate is currently composed of 57 Democrats, 41 Republicans, and 2 Independents. However, both of the Independents (Lieberman and Sanders) caucus with the Democrats, thereby giving the Democrats a 59 to 41 working majority.
There are 37 Senate seats at stake in this election. (Normally, there would have been 34 Senate seats at stake in this election cycle. However, the death of West Virginia Senator Robert Byrd has led to a special election for the remaining two years of his term, the appointment of former New York Senator Hillary Clinton as Secretary of State has led to a special election for the remaining two years of her term, and the election of Joe Biden of Delaware to the Vice Presidency has led to a special election for the remaining four years of his term.) Democrats currently hold 19 of the seats at stake (including all three of the special election seats), and Republicans hold 18. Thus, before any votes are counted, Democrats hold 40 seats that are not at stake (including Lieberman and Sanders) and Republicans hold 23 that are not up in this election.
All political pundits agree that Republicans will increase their numbers in the Senate after the votes are counted this year. The big question, though, is: By how much? More specifically, will the Republicans become the majority party in the U.S. Senate by increasing their number from 41 to 51 with a net gain of 10 seats? (Republicans need to get to 51 to have a majority because Vice President Joe Biden would break any tie in favor of the Democrats in organizing the Senate, though there is speculation that several different senators may contemplate a party switch after the election, including Republican Olympia Snowe and Democrat Ben Nelson – or that Joe Lieberman could decide to caucus with Republicans.)
As explained below, I believe that the Republicans will increase their numbers substantially, but will likely fall one seat short of obtaining a majority. Assuming no changes in party or caucus, the Senate will be split 50-50 with Joe Biden’s vote giving the Democrats a shaky majority.
Democrat Holds (10 of 19): California (Barbara Boxer), Connecticut (Richard Blumenthal), Delaware special (Chris Coons), Hawaii (Daniel Inouye), Maryland (Barbara Mikulski), New York (Charles Schumer), New York special (Kirsten Gillibrand), Oregon (Ron Wyden), Vermont (Patrick Leahy), West Virginia special (Joe Manchin).
Republican Holds (18 of 18): Alabama (Richard Shelby), Alaska (Joe Miller, though a write-in victory by Lisa Murkowski should also translate into a Republican hold), Arizona (John McCain), Georgia (Johnny Isakson), Florida (Marco Rubio), Idaho (Mike Crapo), Iowa (Charles Grassley), Kansas (Jerry Moran), Kentucky (Rand Paul), Louisiana (David Vitter), Missouri (Roy Blunt), New Hampshire (Kelly Ayotte), North Carolina (Richard Burr), Ohio (Rob Portman), Oklahoma (Tom Coburn), South Carolina (Jim DeMint), South Dakota (John Thune), Utah (Mike Lee).
Predicted Seat Changes – 9 Senate Seats Move from Democrat to Republican Column –
- Arkansas - Republican Congressman John Boozman Mark Begich will defeat incumbent Democrat Senator Blanche Lincoln.
- Colorado – Republican District Attorney Ken Buck defeats incumbent Democrat Senator Michael Bennet.
- Illinois – Republican Congressman Mark Kirk will defeat Democrat State Treasurer Alexi Giannoulias to take Barack Obama’s former Senate seat (now held by Roland Burris).
- Indiana – Republican former Senator Dan Coats will defeat Democrat Congressman Brad Ellsworth to replace retiring Democrat Senator Evan Bayh.
- Nevada – Republican former State Assemblywoman Sharron Angle defeats incumbent Democrat Senate Majority Leader Harry Reid.
- North Dakota - Republican Governor John Hoeven defeats Democrat State Senator Tracy Potter to replace retiring Democrat Senator Byron Dorgan.
- Pennsylvania – Republican former Congressman Pat Toomey will defeat Democrat Congressman Joe Sestak to replace Democrat Senator Arlen Specter, who lost to Sestak in the Democrat primary.
- Washington - Republican former State Senator Dino Rossi defeats incumbent Democrat Senator Patti Murray.
- Wisconsin - Republican businessman Ron Johnson defeats incumbent Democrat Senator Russ Feingold.
The Races to Watch (i.e., where I could be wrong): Alaska, California, Colorado, Connecticut, Illinois, Nevada, Pennsylvania, Washington, and West Virginia.