Sen. Darline Graham, sister of the late Sen. Lindsey Graham, released a campaign video for the U.S. Senate seat following her brother's funeral, backed by an endorsement from President Donald Trump. The move comes as a tight primary battle unfolds in South Carolina, with Rep. Ralph Norman leading in a recent Emerson College poll. Norman, speaking on CBS News' 'The Takeout,' said he expects the race to go to a runoff, citing the narrow margin. The poll showed Norman with a slim lead over Graham, indicating a competitive contest to fill the seat left vacant by Lindsey Graham's death. The video launch and Trump's backing add significant momentum to Darline Graham's campaign, but the primary remains highly contested as both candidates vie for the Republican nomination.