(Think Progress) — In an unexpected move, Sen. Jim DeMint (R-SC), an arch-conservative and leader of the Tea Party movement, is resigning his seat in order to head up the Heritage Foundation, a conservative think tank in Washington DC.

DeMint has been among the most extreme members of the Senate since first getting elected in 2004, drawing a hard-right line on issues from unions to LGBT rights to abortion and beyond.

Here’s a look back at some of DeMint’s Senate highlights:

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