Senate Majority Leader Mitch McConnell asked Senate Democrats on Tuesday not to launch what he said would be "the first filibuster of a nominee to be the FBI director."

"I would hope that with all the threats facing us at home and abroad, our Democratic colleagues would not launch the first filibuster of a nominee to be the FBI director," McConnell, R-Ky., said of Christopher Wray on the Senate floor.

The Senate is expected to vote on Wray's nomination Tuesday evening. Wray was nominated by President Trump to replace James Comey, whom he fired unexpectedly in May.

McConnell noted that Wray was smoothly reported out of the Senate Judiciary Committee by a vote of 20-0 late last month. However, not all Democrats are expected to be on board for Wray's full Senate vote.

Democrats "have thrown up one unnecessary procedural hurdle after the next on even the most uncontroversial of nominees," McConnell said, adding that at the current pace, it would "now take 12 years" to confirm the remaining appointments sent to the Senate by President Trump.

In July, McConnell spokesman David Pope said McConnell plans to vote to confirm Wray to the FBI post before senators leave Washington for the recess on August 11.

"I hope #Senate Democrats will work with us in confirming yet another noncontroversial nominee, Christopher Wray, to lead the @FBI," McConnell said on Twitter early Tuesday.