Senate Minority Leader Mitch McConnell (R., Ky.) said Wednesday that he will not support legislation to form a bipartisan commission tasked with investigating the facts and circumstances surrounding the January 6 Capitol riot.

“After careful consideration, I’ve made the decision to oppose the House Democrats’ slanted and unbalanced proposal for another commission to study the events of January the 6th,” McConnell said on the Senate floor.

McConnell’s opposition will imperil the legislation’s odds of advancing through the Senate.