The Republican nominee for South Carolina's vacant 1st District congressional seat will be decided this week.
Former Gov. Mark Sanford faces former Charleston County Councilman Curtis Bostic on Tuesday in the GOP primary runoff.
The winner Tuesday advances to face Democrat Elizabeth Colbert Bush and Green Party candidate Eugene Platt in the May 7 special election.
The latest campaign finance reports filed with the Federal Election Commission show Sanford has a prohibitive edge in fundraising. He has raised $413,000 during the campaign to about $92,000 for Bostic, who has also loaned his campaign $150,000.
The seat became vacant when Gov. Nikki Haley appointed U.S. Rep. Tim Scott to fill the state's U.S. Senate seat left vacant when Jim DeMint resigned.