The Fifty-first United States Congress, referred to by some critics as the Billion Dollar Congress, was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from March 4, 1889, to March 4, 1891, during the first two years of the administration of U.S. President Benjamin Harrison.
Elections to the United States House of Representatives were held in 1890 for members of the 52nd Congress, taking place in the middle of President Benjamin Harrison's term.
Elections to the United States House of Representatives held in 1888 were held to choose members of the 51st Congress, and were held at the same time as the election of President Benjamin Harrison.
The United States Senate elections of 1894 and 1895 were a slight Republican victory. It was a different story in the House where Democrats suffered massive losses. The senators elected went on to serve in the 54th Congress.
The United States Senate elections of 1858 and 1859 were elections which had the Republican Party gain five additional seats in the United States Senate, but the Democrats retained their majority. That majority would erode in 1860 with the secession of the southern states leading up to the Civil War. In Illinois, incumbent Stephen A. Douglas (D) and challenger Abraham Lincoln (R) held a series of seven debates, known as the "Lincoln–Douglas debates."
The United States Senate elections of 1896 and 1897 were elections in which the Democratic Party lost seven seats in the United States Senate, mostly to smaller third parties.
In the United States Senate elections of 1870 and 1871, the Republican Party lost five seats in the United States Senate, though it still retained an overwhelming majority. In advance of these elections, the last four seceded states were readmitted to the Senate.
The United States Senate elections of 1872 and 1873 were elections which had the Republican Party, while still retaining a commanding majority, lose two seats in the United States Senate. By the beginning of the Congress, however, they'd lost three more: two as defections to the Liberal Republican Party, and one a resignation of Henry Wilson to become U.S. Vice President. These elections also coincided with President Ulysses S. Grant's easy re-election.
The United States Senate elections of 1876 and 1877 had the Democratic Party gain five seats in the United States Senate, and coincided with Rutherford B. Hayes's narrow election as President. Republicans remained in the majority, however.
The United States Senate elections of 1900 and 1901 were elections in which the Democratic Party gained two seats in the United States Senate, and which corresponded with President William McKinley's landslide re-election. By the beginning of the next Congress, however, the Republicans gained five additional seats, giving them a ten-seat majority.
The United States Senate elections of 1902 and 1903 were elections which had the Democratic Party gain three seats in the United States Senate, but the Republicans kept their strong majority.
The United States Senate elections of 1878 and 1879 were elections which had the Democratic Party retake control of the United States Senate for the first time since before the Civil War.
The United States Senate elections of 1880 and 1881 were elections that coincided with the presidential election of 1880, and had the Democratic Party lose five seats in the United States Senate. The newly elected Readjuster senator caucused with the Republicans, and the Republican Vice President's tie-breaking vote gave the Republicans the slightest majority. All of that changed September 19, 1881 when the Vice President ascended to the Presidency and the Senate became evenly-divided.
The United States Senate elections of 1882 and 1883 saw the Republicans retain a narrow majority — 39 out of 76 — with the Readjusters in their caucus.
The United States Senate elections of 1884 and 1885 were elections that coincided with the presidential election of 1884. Both Republicans and Democrats lost seats in the United States Senate due to the failure of three state legislatures to finish elections in time. Republicans, nevertheless, retained majority control and the Readjusters joined their caucus. By the beginning of the first session, in December 1885, Republicans had won all three vacant seats, increasing their majority.
The United States Senate elections of 1890 and 1891 were elections in which the Republican Party lost four seats in the United States Senate, though still retaining a slim majority. That majority was increased, however, upon the admission of two more states with Republican senators.
The United States Senate elections of 1906 and 1907 were elections which had the Republican Party gain three seats in the United States Senate, expanding their majority to more twice that of the opposing Democratic Party.
The United States Senate elections of 1866 and 1867 were elections that saw the Republican Party gain two seats in the United States Senate as several of the Southern States were readmitted during Reconstruction, enlarging their majority.
The United States Senate elections of 1860 and 1861 were elections corresponding with Abraham Lincoln's election to the presidency. The nascent Republican Party increased their Senate seats in the general elections, and after southern Democrats withdrew to join the Confederacy, Republicans gained control of the United States Senate. To establish a quorum with fewer members, a lower total seat number was taken into account.
