Prior to recessing for a month, the Senate on Tuesday night confirmed just four of 24 pending nominees. Sixteen of the 20 still unconfirmed were reported out of the committee unopposed. 

A senior GOP aid, however, responded to Leahy's statement, telling The Hill it was, in part, Democratic leadership's fault that so few nominees have been processed, since the majority party controls the Senate's schedule.

"If the Democrats would have managed the floor better during July, then they could have processed more," he said. "How many days did we have quorum calls and nothing to do? Presumably Pat Leahy knows Harry ReidHarry ReidConservative Senate candidate calls on GOP to end filibuster Ex-Reid aide: McConnell's 'original sin' was casting ObamaCare as 'partisan, socialist takeover' GOP faces growing demographic nightmare in West MORE’s phone number and could have asked to move some of the nominees."

"Instead, he evidently did nothing, except complain after the work period was over," the staffer added. 

The Senate has confirmed just 11 judicial nominations since the Memorial Day recess in May, and 35 total nominees this year.

The nominees confirmed Wednesday night were Sara L. Darrow to the Central District of Illinois, Richard B. Jackson to the District of Colorado, Kathleen M. Williams to the Southern District of Florida, and Nelva G. Ramos to the Southern District of Texas.