Graham’s Iran war backing under scrutiny as South Carolina voters weigh anti-war sentiment

Graham enters Tuesday GOP primary as favorite amid growing Iran war backlash
US Senator Lindsey Graham speaks at the 61st Munich Security Conference in Munich, Germany (Getty Images)
US Senator Lindsey Graham speaks at the 61st Munich Security Conference in Munich, Germany (Getty Images)

WASHINGTON, DC: The ongoing war with Iran has become a central issue in South Carolina’s Republican Senate primary, where Sen Lindsey Graham is seeking a fifth term while defending his strong support for US military involvement in the conflict.

Although Graham remains the frontrunner, recent polling suggests he could face a runoff if he fails to secure more than 50 percent of the vote in Tuesday’s primary, a first in his four-term Senate career.

The veteran senator, a close ally of President Donald Trump and one of Capitol Hill’s most outspoken voices on foreign policy, has remained steadfast in backing the administration’s approach toward Iran despite growing unease among some Republican voters.

Sen. Lindsey Graham (R-SC) speaks on the phone as he walks through the senate subway of the U.S. Capitol during a vote on March 04, 2026 in Washington, DC. In a 47-53 vote, Senate Republicans blocked a Democratic-backed war powers resolution that would prevent President Donald Trump from continuing the military campaign against Iran. (Photo by Anna Moneymaker/Getty Images)
Senator Lindsey Graham’s phone call in the Senate subway highlights the urgency and intensity of legislative votes taking place on March 4, 2026 (Anna Moneymaker/Getty Images)

Challenger targets Graham from the right

Graham’s most significant challenger, businessman Mark Lynch, has sought to capitalize on anti-war sentiment within parts of the MAGA movement and concerns over the economic impact of the conflict.

Lynch argues that Graham has strayed from the “America First” agenda by supporting foreign aid, interventionist policies and immigration programs that he says prioritize international interests over American workers and taxpayers.

The challenge reflects a broader debate within the Republican Party between traditional national security conservatives and a growing faction skeptical of overseas military engagements.

Pictured (L-R): Donald Trump, Lindsey Graham (Getty Images)
Graham cruised to victory in the 2020 Republican primary with nearly 68 percent of the vote (Getty Images)

Polls show runoff remains possible

An InsiderAdvantage poll released on Monday placed Graham at 51.2 percent support, narrowly above the threshold needed to avoid a runoff.

Lynch received 20.9 percent, while nearly one in five voters remained undecided.

Another survey conducted by The Citadel School of Humanities and Social Sciences found Graham below the required mark, with 46 percent support compared with 36 percent for Lynch.

By comparison, Graham cruised to victory in the 2020 Republican primary with nearly 68 percent of the vote.

WASHINGTON, DC - NOVEMBER 6: (L-R) President Donald Trump shakes hands with Sen. Lindsey Graham (R-S
Trump shakes hands with Sen Lindsey Graham during an event about judicial confirmations in the East Room of the White House on November 6, 2019, in Washington, DC (Drew Angerer/Getty Images)

Trump backs Graham despite growing war concerns

President Trump has thrown his support behind Graham, praising the senator during a tele-rally on Monday. 

“Lindsey has been fighting with me all the way,” Trump told supporters while expressing confidence that the United States would ultimately prevail in the conflict.

Graham has defended the administration’s military campaign even as voters raise concerns about inflation and rising fuel costs linked to regional instability. 

“The only answer I know to give you is an honest one. They’ll come down when this war winds down, and we’re inside the 10-yard line,” Graham said in a recent interview.

He argued that preventing Iran from obtaining nuclear weapons justified the economic and political costs associated with the conflict.

The South Carolina primary is also being viewed as a referendum on Trump’s political influence within the Republican Party. 

Beyond the Senate race, voters will decide a competitive Republican gubernatorial contest in which Trump has endorsed Lt Gov Pamela Evette over several prominent state Republicans.

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