Republican [[Olympia Snowe]] is the incumbent. Two Republicans and two Democrats have declared.
Republican [[Olympia Snowe]] is the incumbent. Two Republicans and two Democrats have declared.
+
'''* Maryland'''
−
* Maryland
+
Democrat [[Ben Cardin]] is the incumbent. One Democrat and five Republican challengers.
−
* Massachusetts
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−
* Michigan
+
'''* Massachusetts'''
−
* Minnesota
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−
* Mississippi
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Republican [[Scott Brown]] is the incumbent. Three Democrats running and socialist [[Elizabeth Warren]] is the expected challenger.
−
* Missouri
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−
* Montana
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'''* Michigan'''
−
* Nebraska
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−
* Nevada
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Democrat [[Debbie Stabenow]] is the incumbent. Nine Republican challengers including [[Pete Hoekstra]].
−
* New Jersey
+
+
'''* Minnesota'''
+
+
Democrat [[Amy Klobuchar]] is the incumbent. Two Democrat and three Republican candidates have declared.
+
+
'''* Mississippi'''
+
+
Republican [[Roger Wicker]] is the incumbent. Three Democrats have declared.
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+
'''* Missouri'''
+
+
Democrat [[Claire McCaskill]] is the incumbent. One Democrat and three Republicans have declared.
+
+
'''* Montana'''
+
+
Democrat [[Jon Tester]] is the incumbent. One Republican running.
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+
'''* Nebraska'''
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+
Democrat [[Ben Nelson]] is the incumbent. Five Republicans and 1 Democrat have declared.
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+
'''* Nevada'''
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+
Republican [[Dean Heller]] was appointed in 2011 to replace [[John Ensign]] and is considered the incumbent. Two Democrats and 1 Republican have declared.
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+
'''* New Jersey'''
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+
Democrat [[Bob Menendez]] is the incumbent. 3 Republican, 2 Democrats and 2 Independents have declared.
'''* New Mexico'''
'''* New Mexico'''
Democrat [[Jeff Bingaman]] is retiring. Martin Heinrich (D) and Heather Wilson (R) have declared.
Democrat [[Jeff Bingaman]] is retiring. Martin Heinrich (D) and Heather Wilson (R) have declared.