The first U.S. Congress was from 1789–1791 but it wasn’t until the 66th hat there was a Minority Leader and 69th that there was both a Minority and Majority Leader in the Senate. The primary reason I did this was because this week Harry Reid died from Nevada. He served as the Majority Leader from 110th to 113th Congress and Minority Leader in 114th Congress. The longest Republican holding either one is Mitch McConnell. The longest Democrat holding either one is Mike Mansfield. The salary for a senator is $174,000 in 2021 although it was $42,500 in 1971, $7,500 in 1921, and $5,000 in 1871. Here is the list of the Majority and Minority Leaders from 1919 to 2021. Information is from U.S. Senate. If you want to know more from the website, click on the link below.