In the 18th century, rotating congressmen were the norm. It was an idea ingrained in the grass roots.
But by the turn of the 20th century, incumbency was king.
“Reformers during the early 1990s used the initiative and referendum to put congressional term limits on the ballot in 24 states. Voters in eight of these states approved the congressional term limits by an average electoral margin of two to one.[22] In the elections of 1994, part of the Republican platform was to pass legislation setting term limits in Congress. After winning the majority, they brought a constitutional amendment to the House floor.
It limited members of the Senate to two six-year terms and members of the House to six two-year terms. Because the Republicans held 230 seats in the House, they were able to get a simple majority. However, constitutional amendments require a two-thirds majority, or 290 votes, and the votes to restrict term limits in Congress fell short of that number.
In 2007, Professor Larry J. Sabato revived the debate over term limits by arguing in A More Perfect Constitution that the success and popularity of term limits at the state level suggests that they should be adopted at the federal level as well. He specifically put forth the idea of congressional term limits and suggested a national constitutional convention be used to accomplish the amendment, since the Congress would be unlikely to propose and adopt any amendment that limits its own power.”
Source