State Rep. Jenny Horne, of Summerville, will challenge Mark Sanford for the 1st Congressional District seat.
Horne will seek the Republican nomination for the seat in June of 2016 and cited Sanford's "lack of results" as her reason for running, according to a news release.
Rep. Horne represents State House District 94, which incorporates parts of Dorchester and Charleston Counties.
She has served in the General Assembly since 2009, and serves on the House Judiciary and Ethics Committees.
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