answers: 1975
context: was adopted on January 23, 1933, Section 1 shortened the terms of representatives elected to the 73rd Congress (1933–35), as well as those of senators elected for terms ending in 1935, 1937, and 1939, by days. Section 5 also resulted in the 73rd Congress not being required to meet until January 3, 1934. The first Congress to open its first session on the new date was the 74th Congress in 1935. The first presidential and vice presidential terms to begin on the date appointed by the Twentieth Amendment were the second terms of President Roosevelt and Vice President Garner, on </s> required to bring the matter to a vote. A rule change in 1917 introduced cloture, permitting a two-thirds majority of those present to end debate, and a further change in 1975 reduced the cloture requirement to three-fifths of the entire Senate. Proponents of the 60-vote rule have argued that the Senate is a less-than-democratic body that could conceivably allow a simple majority of senators, representing a minority of the national population, to enact legislation or confirm appointees lacking popular support. In 2005, Democrats claimed the nuclear option was an attempt by Senate Republicans to hand confirmation power to themselves. Rather </s> early 19th century the principle of simple-majority voting in the Senate was well established, and particularly valued by Southern slave-holding states. New states were admitted to the Union in pairs to preserve the sectional balance in the Senate, most notably in the Missouri Compromise of 1820. Until the late 1830s, however, the filibuster remained a solely theoretical option, never actually exercised. The first Senate filibuster occurred in 1837. In 1841, a defining moment came during debate on a bill to charter the Second Bank of the United States. Senator Henry Clay tried to end the debate via majority vote, and
question: when did the senate changed to 60 votes