Incumbency Advantage in House

	Seeking	No	Defe	ated	Percent
	reelection	opponent	Primary	General	Reelected
1946	398	81	18	52	82.4%
1948	400	83	15	68	79.2%
1950	400	99	6	32	90.5%
1952	389	93	9	26	91.0%
1954	407	86	6	22	93.1%
1956	411	73	6	16	94.6%
1958	396	94	3	37	89.9%
1960	405	78	5	25	92.6%
1962	402	58	12	22	91.5%
1964	397	42	8	45	86.6%
1966	411	56	8	41	88.1%
1968	409	46	4	9	96.8%
1970	401	59	10	12	94.5%
1972	390	54	12	13	93.6%
1974	391	59	8	40	87.7%
1976	384	52	3	13	95.8%
1978	382	59	5	19	94.1%
1980	398	53	6	31	90.7%
1982	396	53	8	29	90.6%
1984	410	60	3	17	95.1%
1986	393	71	2	6	98.0%
1988	410	79	1	6	98.3%
1990	406	74	0	15	96.3%
1992	350	17	19	24	87.7%
1994	389	38	4	34	90.2%
50 year Avg.	397	65.1	7.2	26.2	91.5%