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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
Alabama	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
Alaska	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
Arizona	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
Arkansas	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
California	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
Colorado	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
Connecticut	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
Delaware	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
Florida	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
Georgia	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
Hawaii	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
Idaho	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
Illinois	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
Indiana	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
Iowa	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
Kansas	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
Kentucky	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
Louisiana	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
Maine	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
Maryland	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
Massachusetts	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
Michigan	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
Minnesota	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
Mississippi	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
Missouri	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
Montana	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
Nevada	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
New Hampshire	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
New Jersey	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
New Mexico	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
New York	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
North Carolina	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
North Dakota	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
Ohio	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
Oklahoma	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
Oregon	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
Pennsylvania	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
Rhode Island	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
South Carolina	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
South Dakota	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
Tennessee	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
Texas	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
Utah	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
Vermont	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
Virginia	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
Washington	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
West Virginia	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
Wisconsin	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
Wyoming	House	-8	-8	-8	-8	-8	-8	-32	-30	-32	-26	-16

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