(Updates at the bottom.)
Although Tuesday, March 19, isn't the election, it is the primary and with 18 candidates running it will decide much.
WTOC 11 has filed a video report on the wide field and the general confusion amongst voters in the 1st Congressional District in Beaufort, Colleton, and Jasper counties; check out that video up top or over here.
The station has also compiled a quick sheet with brief bios and links for each candidate, it's enough to get you started on figuring out the candidate you'd like to see in office.
Update March 18: The Post and Courier also offers pre-primary coverage with basics on Tuesday's voting.
The paper's also offers profiles of each candidate; find those here.
If you're not sure where to vote, you can use the State Election Commission's online tool.
Republicans will almost surely be headed for a runoff on April 2 — the field of 16 candidates almost surely means none will capture 50% of the vote Tuesday.