Congress established the Territory of Minnesota. Slavery was prohibited in the new territory.
Henry M. Rice and James Shields, both of St. Paul, took the oath of office as Minnesota's first two U.S. senators. Both Rice's and Shields's elections were contested, but both were eventually seated. Shields holds the distinction of being the only senator to represent three separate states: Illinois (1849-1855); Minnesota (1858-1859); Missouri (1879).
Samuel J. R. McMillan of St. Paul became chairman of the Senate Committee on Commerce (today's Committee on Commerce, Science, and Transportation), a position he held from 1881 to 1887.
Knute Nelson of Alexandria became chairman of the Senate Committee on Commerce (today's Committee on Commerce, Science, and Transportation), a position he held from 1911 to 1913.
Congress officially unveiled a marble statue of Henry M. Rice, one of Minnesota's two contributions to the National Statuary Hall Collection. The 7-foot, 7-inch marble statue is the work of artist Frederick E. Triebel.
Knute Nelson, Minnesota's longest-serving senator, died in office. One of only two Civil War veterans still serving in the Senate at the time of his death, Nelson had been a senator since March 4, 1895, serving for 28 years, 1 month, and 25 days.
The Senate voted to allow Thomas D. Schall to retain his Senate seat. Schall had defeated incumbent senator Magnus Johnson in the 1924 election. On February 2, 1925, with just a month remaining in his Senate term, Johnson announced that he planned to contest Schall's election. Schall faced another challenge in 1930, when Einar Hoidale contested his reelection to the seat. Once again, the Senate voted to dismiss charges of fraud and allowed Schall to retain his seat.
Future senator Wendell Anderson of St. Paul represented the United States in the 1956 Olympic Games in Cortina, Italy, as a member of the U.S. hockey team. Anderson and his teammates took home silver medals. Anderson served in the U.S. Senate from December 30, 1976, until his resignation on December 29, 1978.
Congress officially unveiled a bronze statue of Maria L. Sanford, Minnesota's second contribution to the National Statuary Hall Collection. The 6-foot, 11-inch bronze statue is the work of sculptor Evelyn Raymond.
Walter F. Mondale of Minneapolis was appointed to fill the vacancy caused by the resignation of Hubert H. Humphrey for the term ending January 3, 1967. Senator Mondale was elected to a full term in 1966, reelected in 1972, and served from December 30, 1964, until his own resignation to become vice president on December 30, 1976.
Having resigned his Senate seat on December 29, 1964, following his election as vice president of the United States, Hubert H. Humphrey took the oath of office, serving with President Lyndon B. Johnson. After four years as vice president, and an unsuccessful run for the presidency in 1968, Humphrey returned to the Senate in 1971 and served until his death on January 13, 1978.
The Senate passed S. Resolution 17, 95-1, which provided that "any Member of the Senate who has held the Office of President of the United States or Vice President of the United States shall be a Deputy President pro tempore," thus making former vice president Hubert H. Humphrey deputy president pro tempore of the Senate. Humphrey served until his death on January 13, 1978.
Having resigned his Senate seat on December 30, 1976, following his election as vice president of the United States, Walter F. Mondale took the oath of office, serving with President Jimmy Carter. Mondale served in that office for four years. In 1980 he and Carter ran unsuccessfully for reelection, losing to Ronald Reagan and George H. W. Bush.
Muriel Buck Humphrey of Waverly became Minnesota's first woman senator when she was appointed to fill the seat left vacant by the death of her husband, Senator Hubert Humphrey. Muriel Humphrey served until November 7, 1978, and was not a candidate for election to the unexpired term.
President Jimmy Carter posthumously awarded the Presidential Medal of Freedom to Senator and Vice President Hubert H. Humphrey for his "passion for social justice," his "joyous love of his fellow human beings," and for ennobling the political process.
The Senate formally unveiled a marble bust of former vice president Hubert H. Humphrey in the Capitol. Part of the Senate Vice Presidential Bust Collection, the bust was carved by Walker Kirtland Hancock and had been completed in 1982.
Senator Rudy Boschwitz of Wayzata was chosen to serve as chairman of the Republican Senatorial Campaign Committee. He held that position for two years.
The Senate commissioned a marble bust of former vice president Walter F. Mondale for the Senate Vice Presidential Bust Collection. The marble bust was carved by artist Judson R. Nelson and placed in the Capitol in 1988.
Senator David F. Durenberger of Minneapolis was denounced for reprehensible conduct, and for bringing the Senate into dishonor and disrepute. Durbenberger was charged with unnethical conduct in connection with his business transactions, failure to report receipt of travel expenses, acceptance of prohibited gifts of limousine service for personal use, and conversion of campaign funds to personal use. Durenberger, who had served in the Senate since November 8, 1978, did not run for reelection in 1994.
Al Franken took his oath of office as a United State Senator eight months after his election. Franken's election had been contested by the incumbent senator Norm Coleman. After a lengthy recount of ballots, the Minnesota state supreme court decided the election in Franken’s favor.