Trends in legislative party control

Trends in Legislative Party Control

 

The chart below reflects which party held the majority when the legislative session directly following an even-year election began. Data compiled using past editions of The Book of the States and the 2008 election results.

 

Back to Legislative Races

 Majority
Democrat Legislative Session
Republican
Split
State 1989 1991 1993 1995 1997 1999 2001 2003 2005 2007 2009
Alabama Senate 13 13 13 13 13 13 13 15 15 11 11
House 13 13 13 13 13 13 29 23 22 19 11
Alaska Senate -8 0 0 -8 -8 -8 -8 -4 -4 -2 0
House 13 13 13 -8 -8 -8 -14 -14 -12 -6 -6
Arizona Senate -8 13 -8 -8 -8 -8 -8 0 -6 -4 -4
House -8 -8 -8 -8 -8 -8 -12 -18 -16 -6 -6
Arkansas Senate 13 13 13 13 13 13 19 19 19 19 11
House 13 13 13 13 13 13 40 44 44 50 11
California Senate 13 13 13 13 13 13 12 10 10 10 10
House 13 13 13 -8 13 13 20 16 16 16 16
Colorado Senate -8 -8 -8 -8 -8 -8 1 -1 1 5 5
House -8 -8 -8 -8 -8 -8 -9 -9 5 13 13
Connecticut Senate 13 13 13 13 13 13 6 6 12 12 12
House 13 13 13 13 13 13 49 37 47 63 63
Delaware Senate 13 13 13 13 13 13 5 5 5 5 5
House -8 -8 -8 -8 -8 -8 -11 -17 -10 -5 -5
Florida Senate 13 13 0 -8 -8 -8 -10 -11 -12 -12 -12
House 13 13 13 13 -8 -8 -34 -42 -48 -38 -38
Georgia Senate 13 13 13 13 13 13 8 -4 -12 -12 -12
House 13 13 13 13 13 13 31 35 -19 -32 -32
Hawaii Senate 13 13 13 13 13 13 19 15 15 15 15
House 13 13 13 13 13 13 13 21 31 35 35
Idaho Senate -8 0 -8 -8 -8 -8 -28 -21 -21 -21 -21
House -8 -8 -8 -8 -8 -8 -52 -38 -44 -32 -32
Illinois Senate 13 13 -8 -8 -8 -8 -5 -6 4 15 15
House 13 13 13 -8 13 13 6 14 12 14 14
Indiana Senate -8 -8 -8 -8 -8 -8 -14 -14 -16 -16 -16
House 0 13 13 -8 0 13 6 2 -4 2 2
Iowa Senate 13 13 13 13 -8 -8 -10 -8 0 10 10
House 13 13 -8 -8 -8 -8 -12 -9 -2 8 8
Kansas Senate -8 -8 -8 -8 -8 -8 -20 -20 -20 -20 -20
House -8 13 -8 -8 -8 -8 -33 -35 -41 -31 -31
Kentucky Senate 13 13 13 13 13 -8 -2 -6 -7 -5 -5
House 13 13 13 13 13 13 32 30 14 22 22
Louisiana Senate 13 13 13 13 13 13 11 8 9 9 9
House 13 13 13 13 13 13 37 36 30 16 16
Maine Senate 13 13 13 -8 13 13 1 1 3 1 1
House 13 13 13 0 13 13 12 13 3 29 29
Maryland Senate 13 13 13 13 13 13 19 19 19 19 19
House 13 13 13 13 13 13 71 55 55 67 67
Massachusetts Senate 13 13 13 13 13 13 26 28 28 30 30
House 13 13 13 13 13 13 114 112 115 122 122
Michigan Senate -8 -8 -8 -8 -8 -8 -8 -6 -6 -4 -4
House 13 13 0 -8 13 -8 -5 15 -6 6 6
Minnesota Senate 13 13 13 13 13 13 10 4 4 21 21
House 13 13 13 13 13 -8 -6 -27 -2 36 36
Mississippi Senate 13 13 13 13 13 13 16 10 4 -2 11
House 13 13 13 13 13 13 53 43 28 27 11
Missouri Senate 13 13 13 13 13 13 -4 -6 -12 -8 -8
House 13 13 13 13 13 13 11 -17 -31 -21 -21
Montana Senate -8 -8 13 -8 -8 -8 -12 -8 4 2 -21
House 13 -8 -8 -8 -8 -8 -16 -6 -1 -1 2
Nebraska Unicameral               0 0 0 0
Nevada Senate -8 0 -8 -8 -8 -8 -3 -5 -3 -1 2
House 13 13 13 0 13 13 12 4 10 12 2
New Hampshire Senate -8 -8 -8 -8 -8 0 -2 -12 -8 4 2
House -8 -8 -8 -8 -8 -8 -113 -165 -103 78 2
New Jersey Senate 13 -8 -8 -8 -8 -8 0 0 4 4 11
House 13 -8 -8 -8 -8 -8 8 8 14 18 11
New Mexico Senate 13 13 13 13 13 8 6 6 6 6 2
House 13 13 13 13 13 8 14 14 14 14 2
New York Senate -8 -8 -8 -8 -8 -8 -11 -12 -6 -4 2
House 13 13 13 13 13 8 48 56 58 60 2
North Carolina Senate 13 13 13 13 13 8 20 6 8 12 2
House 13 13 13 13 -8 8 4 0 6 16 2
North Dakota Senate 13 13 13 -8 -8 -8 -15 -15 -17 -5 -5
House -8 -8 -8 -8 -8 -8 -40 -38 -40 -28 -5
Ohio Senate -8 -8 -8 -8 -8 -8 -10 -11 -11 -9 -5
House 13 13 13 -8 -8 -8 -20 -23 -19 -7 2
Oklahoma Senate 13 13 13 13 13 8 12 7 4 0 -13
House 13 13 13 13 13 8 4 5 -13 -13 -13
Oregon Senate 13 13 13 -8 -8 -8 -2 0 6 6 2
House 13 -8 -8 -8 -8 -8 -4 -10 -6 2 2
Pennsylvania Senate -8 -8 -8 -8 -8 -8 -8 -7 -11 -8 -8
House 13 13 13 -8 -8 -8 -6 -14 -17 1 2
Rhode Island Senate 13 13 13 13 13 8 36 26 28 28 2
House 13 13 13 13 13 8 74 52 45 49 2
South Carolina Senate 13 13 13 13 13 8 -4 -3 -6 -6 -6
House 13 13 13 -8 -8 -8 -18 -23 -24 -22 -6
South Dakota Senate -8 -8 13 -8 -8 -8 -13 -17 -15 -5 -5
House -8 -8 -8 -8 -8 -8 -30 -28 -32 -30 -5
Tennessee Senate 13 13 13 -8 13 8 3 3 -1 -1 -5
House 13 13 13 13 13 8 16 9 7 7 -5
Texas Senate 13 13 13 13 -8 -8 0 -7 -7 -9 -5
House 13 13 13 13 13 8 7 -26 -24 -12 -5
Utah Senate -8 -8 13 -8 -8 -8 -11 -15 -13 -13 -5
House -8 -8 -8 -8 -8 -8 -27 -37 -37 -35 -5
Vermont Senate 13 0 -8 -8 13 8 3 8 12 16 2
House -8 -8 13 13 13 8 -20 -5 23 44 2
Virginia Senate 13 13 13 0 -8 0 -4 -6 -8 -6 11
House 13 13 13 13 13 -8 -30 -30 -22 -17 -17
Washington Senate -8 -8 13 13 -8 1 1 -1 3 15 2
House 13 13 13 -8 -8 0 2 6 12 26 2
West Virginia Senate 13 13 13 13 13 13 22 14 8 12 2
House 13 13 13 13 13 13 50 36 36 44 2
Wisconsin Senate 13 13 -8 -8 13 13 3 -5 -5 3 2
House 13 13 13 -8 -8 -8 -13 -18 -21 -5 2
Wyoming Senate -8 -8 -8 -8 -8 -8 -10 -10 -16 -16 -16
House -8 -8 -8 -8 -8 -8 -32 -30 -32 -26 -16
 
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