A federal appeals court on Thursday denied a request by Sen. Lindsey Graham (R-S.C.) to be shielded from testifying in an investigation into former President Trump’s alleged interference in the 2020 election in Georgia.

The unanimous ruling by a three-judge panel of the U.S. Court of Appeals for the 11th Circuit comes after the senator earlier this month urged the court to find that constitutional protections for lawmakers bar his testimony before a Fulton County, Ga., special grand jury.