Lowcountry Republicans go to the polls beginning at 7 this morning to pick their 1st Congressional District nominee — either former Charleston County Councilman Curtis Bostic or former Gov. Mark Sanford.

After the polls close at 7 p.m., the tally will tell who faces off May 7 against Democrat Elizabeth Colbert Busch and Green Party candidate Eugene Platt.

Sanford and Bostic finished with the most votes in the 16-way GOP primary two weeks ago to qualify for today's runoff.

Who can vote

Those who voted in the March 19 Democratic primary can't cross over and vote in today's GOP runoff.

Also, only voters in the 1st District are eligible to vote.

READ MORE:

Go to postandcourier.com/first-district for additional coverage.

The congressional district, redrawn last year, includes parts of Beaufort, Berkeley, Charleston, Colleton and Dorchester counties. Other parts of these counties are in the 6th District. To find which district you are in, go to scvotes.org and check your registration under the “voters” tab.

Turnout is expected to be lighter than two weeks ago, when only 12 percent of registered voters voted in the GOP primary. Long lines aren't expected to be an issue.

What to bring

Voters should bring one of five types of photo IDs to the polls: a state driver's license, a DOT-issued photo ID, a new voter registration card with a photo, a U.S. passport or a federal military ID.

Those who have only an old voter registration card without a photo still can vote if they sign a paper saying why they do not have a photo ID.