National Journal is reporting that according to Democratic sources, Sen. Herb Kohl, D-Wis., will not seek reelection in 2012. Wisconsin was already set to be a fiercely contested battleground state in the presidential election, adding a senate race to the mix only increases the state’s prominence.
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Indiana's Sen. Richard Lugar is almost certainly the most vulnerable Republican incumbent facing re-election in 2012, and not merely because he's been in the Senate since 1977 and ranks third on the Senate's seniority list, trailing only Democrats Daniel Inouye of Hawaii and Patrick Leahy of Vermont.
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