Susan Margaret Collins (born December 7, 1952) is an American politician serving as the senior United States Senator for Maine, a seat to which she was first elected in 1996. A Republican, Collins is the chair of the Senate Special Committee on Aging and is a former chair of the Senate Committee on Homeland Security and Governmental Affairs. She is known also for having never missed a single Senate vote since she became senator, which by September 2015 had reached a 6,000 consecutive voting streak. She is the most senior Republican woman in the Senate and dean of Maine's congressional delegation. She will be the only Republican representing New England in the 116th Congress. Collins has been described as the Senate's most moderate Republican. She often positions herself as a pivotal vote, thus becoming a focal point during highly watched legislation.