What to Watch in Tuesday’s Primary Runoffs in South Carolina and Oklahoma

President Trump’s endorsement track record is on the line in two races, including the high-profile contest to succeed the late Senator Lindsey Graham.

Oklahoma Republicans will return to the polls Tuesday to settle an expensive nomination fight for governor, while Democrats will pick a nominee for U.S. Senate.

NBC News chief data analyst Steve Kornacki breaks down real-time vote tallies from South Carolina's GOP Senate runoff between Darline Graham and Ralph Norman, while giving viewers a behind-the-scenes look at election night coverage.

The early voting period in South Carolina's Republican primary runoff narrowly outpaced the primary ahead of Tuesday's contest between Sen. Darline Graham Nordone and Rep. Ralph Norman.

AP Decision Notes: What to expect in South Carolina’s special U.S. Senate primary runoff  Toronto Star

South Carolina Republicans will return to the polls Tuesday to replace the late U.S. Sen. Lindsey Graham on the fall general election ballot

AP Decision Notes: What to expect in South Carolina’s special U.S. Senate primary runoff  AP News