Comedian Stephen Colbert's sister is running in earnest for the 1st congressional seat.
Elizabeth Colbert-Bush will file next week as a Democrat and make a formal announcement, according to her campaign manager.
The Charleston native is development director at the Clemson University Restoration Institute in North Charleston.
A second Democrat, Martin Skelly, a Charleston County businessman, also announced Friday that he is running in the special election and will put $250,000 of his own money into his run.
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The primaries are March 19, runoffs will be April 2, and the special election is May 7.