Who served as the Junior Senator from Utah with a term expiring in 2017?

Mike S. Lee served as the Junior Senator from Utah with a term that expired in 2017. He was elected to the Senate in 2010, succeeding Bob Bennett. Lee is a member of the Republican Party and is known for his staunch conservative positions, particularly on issues such as limited government and federalism. His term in the Senate reflects a broader trend of increasing partisan polarization and the rise of tea party influence within the Republican Party during that period, representing a shift towards more conservative policies in Utah's political landscape.

The other individuals listed are not relevant to the role of Junior Senator from Utah in that timeframe. Jim Matheson was a Democratic member of the House of Representatives and did not serve in the Senate. Jason Chaffetz was also a House member, and Leon Panetta served in various roles, including Secretary of Defense, but not as a Senator.