The United States Senate elections of 1914, with the ratification of the 17th Amendment in 1913, were the first time that all seats up for election were popularly elected instead of chosen by their state legislatures. These elections occurred in the middle of Democratic President Woodrow Wilson's first term.
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 United States Senate elections of 1908 and 1909, some states elected their senators directly even before passage of the 17th Amendment in 1913. 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 Republicans lost two seats overall.
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 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 1854 and 1855 were elections which saw the final decline of the Whig Party and the continuing majority of the Democrats. Those Whigs in the South who were opposed to secession ran on the "Opposition Party" ticket, and were elected to a minority. Along with the Whigs, the Senate roster also included Free Soilers, Know Nothings, and a new party: the Republicans. Only five of the twenty-one Senators up for election were re-elected.
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 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 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 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 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 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 1840 and 1841 were elections which, corresponding with their Party's success in the 1840 presidential election, had the Whig Party take control of the United States Senate.
The United States Senate elections of 1820 and 1821 were elections for the United States Senate that, corresponding with James Monroe's landslide re-election, had the Democratic-Republican Party gain seven seats, assuming almost complete control of the Senate.
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 1864 and 1865 were elections corresponding with Abraham Lincoln's re-election, with the Republican Party gaining two seats in the United States Senate. As these elections occurred during the Civil War, most of the Southern States were absent.
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.
