Former South Carolina Gov. Mark Sanford has launched a bid for the U.S. Senate, entering a crowded Republican primary field against Darline Graham, who has secured President Donald Trump's endorsement.

Sanford, a vocal critic of Trump who previously served three terms in the House and as governor, announced his candidacy in a video Thursday, citing the nation's growing debt as a primary motivation. "We're at a tipping point, and that's why I've decided to run for the U.S. Senate," Sanford stated. "Our country is at a financial tipping point, and I can't sit on the sidelines while Washington adds a trillion dollars to the debt every 100 days."

Darline Graham, the sister of the late Sen. Lindsey Graham, was appointed last week to fill the remainder of her brother's term. She announced her intention to seek a full six-year term after meeting with President Trump at the White House, where she received his "complete and total endorsement."

Despite Trump's backing of Graham, other prominent South Carolina Republicans are also competing for the nomination. Rep. Ralph Norman announced his bid last weekend, and Rep. Russell Fry followed on Monday. Businessman Mark Lynch, who previously lost to Lindsey Graham in the GOP primary, has also entered the race.

The special Republican Senate primary is scheduled for August 11, with a runoff election to be held on August 25 if no candidate secures over 50% of the vote.

Sanford, known for his fiscal conservatism, previously made a political comeback after a hiatus from public life following an extramarital affair in 2009. He made an unsuccessful bid for the Republican presidential nomination in 2020, challenging Trump.

In contrast to Sanford, Fry and Norman are actively highlighting their support for President Trump. Fry described himself as a "MAGA warrior" and stated he will be "President Trump's favorite U.S. Senator." Norman has emphasized his commitment to standing with Trump and carrying on Lindsey Graham's legacy, also expressing a desire to pass the "SAVE America Act."

Republican Sens. Mike Lee and Rick Scott have endorsed Norman, citing his support for Trump's election reform bill. Rep. Nancy Mace, who had previously announced she would not run for the Senate, has endorsed Norman.

Darline Graham has garnered support from key congressional figures, including Senate Majority Whip John Barrasso, who called her an "excellent senator." Senate Majority Leader John Thune acknowledged Graham as a "strong candidate" with considerable accomplishments outside of elected office.

Pundits consider Darline Graham a frontrunner due to Trump's endorsement and her name recognition. The winner of the Republican primary is expected to be the strong favorite against Democratic nominee Annie Andrews in the general election in the Republican-leaning state.

Strategists note that while Trump's endorsement provides a significant boost, it does not guarantee a victory. The dynamics of special elections and the timing of opportunities play crucial roles in South Carolina politics. For aspiring politicians in the state, the current Senate race presents a significant opportunity, regardless of presidential endorsements.