Republican senator Lindsay Graham of South Carolina, who is facing the toughest re-election race of his career, is tied with his Democratic challenger Jaime Harrison, 48-48, in a Quinnipiac University poll.

Other recent polls have also suggested an increasingly tight race. Graham, the chair of the Senate judiciary committee, is moving swiftly on the nomination of conservative judge Amy Coney Barrett to fill the supreme court seat vacated by Ruth Bader Ginsburg – despite saying four years ago no president at the end of his term should nominate a supreme court justice.

“If there’s a Republican president in 2016 and a vacancy occurs in the last year of the first term, you can say Lindsey Graham said, ‘Let’s let the next president, whoever it might be, make that nomination,’” he said in 2016, when Justice Antonin Scalia died, and Graham refused to consider then-president Barack Obama’s nominee.

The Quinnipiac poll sampled likely voters. Of those polled, 49% said the winner of the presidential election should nominate a justice, whereas 47 % said Donald Trump should select a justice before the election.

South Carolinians also said Harrison was more honest and empathetic than Graham.

No Democrat has been elected to the Senate from South Carolina since 1998.