Although the 17th Amendment was not passed until 1913, some states elected their Senators directly before its passage. Oregon pioneered direct election and experimented with different measures over several years until it succeeded in 1907. Soon after, Nebraska followed suit and laid the foundation for other states to adopt measures reflecting the people's will. By 1912, as many as 29 states elected senators either as nominees of their party's primary or in conjunction with a general election.
The 1909 South Carolina United States Senate election of January 26, 1909 was effectively settled on August 25, 1908 and September 8 by a Democratic Party primary election. Prior to the ratification of the 17th Amendment to the United States Constitution, U.S. Senators were elected by the state legislature and not through the direct election by the people of the state.
The 1909 United States Senate election in New York was held on January 19, 1909, by the New York State Legislature to elect a U.S. Senator to represent the State of New York in the United States Senate.
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.
The United States Senate elections of 1856 and 1857 were elections which had the young Republican Party assume its position as one of the United States's two main political parties. The Whigs and Free Soilers were gone by the time the next Congress began.
The United States Senate elections of 1868 and 1869 were elections which had the Republican Party maintain their majority in the United States Senate. However, six former Confederate states were also readmitted separately from the general election, each electing two Republicans. This increased the Republicans' already overwhelming majority to the largest number of seats ever controlled by the party.
The United States Senate elections of 1874 and 1875 had the Democratic Party gain nine seats in the United States Senate from the Republican Party. Republicans remained in the majority, however.
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 1904 and 1905 were elections that coincided with President Theodore Roosevelt's landslide election to a full term. Party share of seats remained roughly the same, when including vacancies and appointments, and the Republicans retained a significant majority over the Democrats.
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 1886 and 1887 were elections that had the Republican Party lose two seats in the United States Senate. At the beginning of the 50th Congress, therefore, Republicans had the slimmest possible majority due to a vacant Democratic seat: 38 out of 75 seats. Once that vacancy was filled, Republicans maintained control as the single Readjuster Senator caucused with them.
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 1892 and 1893 were elections which, corresponding with former Democratic President Grover Cleveland's return to power, had the Republican Party lose nine seats in the United States Senate and lose its majority to the Democratic Party. The Democratic majority, however, was minimal and didn't last past the next Congress.
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.
The United States Senate elections of 1862 and 1863 were elections during the American Civil War in which Republicans increased their control of the U.S. Senate. The Republican Party gained three seats, bringing their majority to 66% of the body. Also caucusing with them were Unionists and Unconditional Unionists. As many Southern states seceded in 1860 and 1861, and members left the Senate to join the Confederacy, or were expelled for supporting the rebellion, seats were declared vacant. To establish a quorum with fewer members, a lower total seat number was taken into account.
The 1909 United States Senate special election in Pennsylvania was held on March 16, 1909. George T. Oliver was elected by the Pennsylvania General Assembly to the United States Senate.
