Senate Majority Leader Mitch McConnell rejected calls for a special prosecutor or independent commission to investigate Russia’s election meddling in the wake of the firing of FBI Director James Comey.

“Today we’ll no doubt hear calls for a new investigation, which could only serve to impede the current work being done,” McConnell said on the Senate floor, referring to the Senate Intelligence Committee’s current probe of Russian interference in the election and possible collusion with President Donald Trump’s campaign. McConnell also slammed Democrats for their criticism of the Comey firing after knocking his performance repeatedly.