U.S. Sens. John McCain (R-AZ) and Ben Cardin (D-MD) are calling on the U.S. to immediately review the revocation of a U.S. visa for William Browder, who has done business in Russia and has worked with the U.S. against Russian human rights violators.

McCain, who serves as chairman of the Senate Armed Services Committee, and Cardin, who is a ranking member of the Senate Foreign Relations Committee, released statements advocating for a review of Browder’s U.S. visa after it was revoked due to his being included on an Interpol list.

“According to Browder, the Russian government has submitted his name for inclusion on the Interpol list on several occasions in the past, yet it was rejected as politically motivated,” McCain and Cardin said in a joint statement. “ And through these episodes, his U.S. visa status has been immediately reinstated. The Department of Homeland Security should expedite an immediate review of the decision to revoke Mr. Browder’s visa."

The senators also said Browder was a strong advocate for anti-corruption around the world who helped to create the Magnitsky Act. The act was named after Sergei Magnitsky, a young Russian lawyer who worked for Browder and was targeted and died while in Russian custody.

“Mr. Browder’s work has helped to remove corrupt actors from our financial system and enhance accountability measures with respect to the U.S. relationship with the Russian Federation – it would be unfortunate if the U.S. decided to bar him based on a decision by those same Russian officials who have been targeted by this important legislation,” the senators said in the statement.