Northeastern Congressional Delegation (HoR)

[ElectionsGuy]

From 1912 to Present.

1912: 78/130 Democratic (60.0%)
1914: 88/130 Republican (67.7%)
1916: 92/130 Republican (70.8%)
1918: ?
1920: 114/130 Republican (87.7%)
1922: 85/130 Republican (65.4%)
1924: 97/130 Republican (74.6%)
1926: 92/130 Republican (70.8%)
1928: 96/130 Republican (73.8%)
1930: 88/130 Republican (67.7%)
1932: 66/129 Republican (51.2%)
1934: 78/129 Democratic (60.5%)
1936: 84/129 Democratic (65.1%)
1938: 72/129 Republican (55.8%)
1940: 69/129 Democratic (53.5%)
1942: 76/127 Republican (59.8%)
1944: 71/127 Republican (55.9%)
1946: 92/127 Republican (72.4%)
1948: 66/127 Republican (52.0%)
1950: 73/127 Republican (57.5%)
1952: 79/123 Republican (64.2%)
1954: 71/123 Republican (57.7%)
1956: 75/123 Republican (61.0%)
1958: 67/123 Democratic (54.5%)
1960: 63/123 Democratic (51.2%)
1962: 60/117 Democratic (51.3%)
1964: 77/117 Democratic (65.8%)
1966: 70/117 Democratic (59.8%)
1968: 68/117 Democratic (58.1%)
1970: 68/117 Democratic (58.1%)
1972: 62/113 Democratic (54.9%)
1974: 75/113 Democratic (66.4%)
1976: 78/113 Democratic (69.0%)
1978: 75/113 Democratic (66.4%)
1980: 66/113 Democratic (58.4%)
1982: 66/104 Democratic (63.5%)
1984: 61/104 Democratic (58.7%)
1986: 62/104 Democratic (59.6%)
1988: 62/104 Democratic (59.6%)
1990: 62/104 Democratic (59.6%)
1992: 54/97 Democratic (55.7%)
1994: 51/97 Democratic (52.6%)
1996: 57/97 Democratic (58.8%)
1998: 58/97 Democratic (59.8%)
2000: 57/97 Democratic (58.8%)
2002: 55/92 Democratic (59.8%)
2004: 56/92 Democratic (60.9%)
2006: 68/92 Democratic (73.9%)
2008: 75/92 Democratic (81.5%)
2010: 62/92 Democratic (67.4%)
2012: 61/87 Democratic (70.1%)
2014: 56/87 Democratic (64.4%)

[ElectionsGuy]

The region has lost 17 seats in 25 years.  i'd also be interested in seeing composition without Pennsylvania, which I think skew the Democratic dominance a bit.

It definitely would, especially in the early half of the 20th century (there were elections where all but one or two seats out of 30-something was Republican) and now with its ridiculously gerrymandered map. I'm not going to run through all the numbers again, but doing a few random years it seems to skew it 2-5 points to the right on average.