Seniority in the United States Senate

Seniority in the United States Senate is the value of a senator based on his/her service. There are two senators per state. The one senator that served more years is called the Senior senator. The one who served less is called the Junior senator.

Other websites

"United States Senate Periodical Press Gallery". Senate.gov. May 2011. Retrieved November 27, 2012.
http://www.senate.gov/artandhistory/history/resources/pdf/chronlist.pdf

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