@Baldimo,
A Visual Guide: The Balance Of Power Between Congress and The Presidency
1945-2010
Which party controls Congress? Which, the White House? The answer reveals the "balance of power" in the two branches of government that have elected officials (Congress and the White House).
Americans seem to prefer that the checks-and-balances envisioned by the founders be facilitated by having different parties control Congress and the White House. This is reflected in the 2010 election results, which will take effect when Congress convenes in January 2011. While the Senate's Democratic majority will remain intact, Republicans will gain at least 60 seats in the House of Representatives, putting it at odds with the Democratically-controlled White House and Senate.
Contrary to popular belief, most of the time (in modern political history) Congress and the President are at odds; that is, most of the time the same political party does not control the White House, the Senate, and the House of Representatives. Only 10 times (20 years) since 1945 have both branches of Congress and the Presidency been controlled by the same party.
However, most of the time, Congress has been controlled by the same party. The "odd man out" has literally been the President. Since 1945, the House and Senate have been controlled by different parties only five times (10 years). And there have been only two complete turn-overs of Congress since 1945: one in 1949 and the other in 2007.
Also see A Guide To Sessions of Congress : Congressional Calendars, 1971-2008
Updated 5 January 2009
Year Congress President Senate (100) House (435)
2009 111th D D - 55*** D - 256
2007 110th R D - 51** D - 233
2005 109th R R - 55 R - 232
2003 108th R R - 51 R - 229
2001 107th R D* R - 221
1999 106th D R - 55 R - 223
1997 105th D R - 55 R - 228
1995 104th D R - 52 R - 230
1993 103rd D D - 57 D - 258
1991 102nd R D - 56 D - 267
1989 101st R D - 55 D - 260
1987 100th R D - 55 D - 258
1985 99th R R - 53 D - 253
1983 98th R R - 54 D - 269
1981 97th R R - 53 D - 242
1979 96th D D - 58 D - 277
1977 95th D D - 61 D - 292
1975 94th R D - 60 D -291
1973 93rd R D - 56 D - 242
1971 92nd R D - 54 D - 255
1969 91st R D - 57 D - 243
1967 90th D D - 64 D - 247
1965 89th D D - 68 D - 295
1963 88th D D - 66 D - 259
1961 87th D D - 64 D - 263
1959 86th R D - 65 D -283
1957 85th R D - 49 D - 232
1955 84th R D - 48 D - 232
1953 83rd R R - 48 D - 221
1951 82nd D D - 49 D - 235
1949 81st D D - 54 D - 263
1947 80th D R - 51 R - 246
1945 79th D D - 57 D - 242
Yellow years mark Presidential inauguration.
Sources: Senate, House, Janda
* There were 50 Ds and 50 Rs until May 24, 2001, when Sen. James Jeffords (R-VT) switched to Independent status, effective June 6, 2001; he announced that he would caucus with the Democrats, giving the Democrats a one-seat advantage.
** Independent Sen. Bernard Sanders (VT) gives the Democrats a one-seat majority.
** Two Independents and two vacancies (IL and MN)