The Senate Armed Services Committee on Tuesday moved forward four long-awaited Pentagon nominees, including Army secretary pick Mark Esper.

The committee in a unanimous voice vote also approved Robert Wilkie to be Defense undersecretary for personnel and readiness, Joseph Kernan to be undersecretary for intelligence, and Guy Roberts to be assistant secretary for nuclear, chemical and biological defense programs.

The voice vote — held in the middle of a Senate Armed Service Committee nomination hearing for additional Pentagon picks — now moves the four nominees to the Senate floor. Esper and the three others could receive a final confirmation vote as early as this week as lawmakers look to quickly fill long-empty Pentagon positions.

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Committee Chairman John McCain John Sidney McCainMomentum growing among Republicans for Supreme Court vote before Election Day McConnell urges GOP senators to 'keep your powder dry' on Supreme Court vacancy McSally says current Senate should vote on Trump nominee MORE (R-Ariz.) told the Washington Examiner that he plans to keep up the pace in moving other Pentagon nominees through the Senate. Of the 57 positions lawmakers must confirm for the Defense Department, 70 percent are still empty.

McCain in the past few months has been holding up several nominees amid disputes about the amount of information the Pentagon is giving Congress about the deadly October ambush in Niger, as well as strategies for Afghanistan and for fighting the Islamic State in Iraq and Syria.

But late last month he emerged satisfied from a classified briefing on Niger, saying that he will lift some of the holds.

During Tuesday’s hearing, McCain grilled four more Trump administration Pentagon picks: Robert Behler for director of operational test and evaluation, Dean Winslow for assistant secretary for health affairs, Thomas Modly for Navy undersecretary and James Geurts for Navy assistant secretary for research, development and acquisition.

He alluded to the slow movement of White House picks in his opening remarks, saying “we had some difficulties, a couple weeks — a week or so ago. And we will not stand for a lack of communication, a lack of responses to questions, or we will exercise our constitutional responsibilities, which is not moving forward with your nominations.”

Esper, who most recently worked as a vice president at Raytheon and lobbied for the defense contractor, went before the Senate Armed Services Committee last week.

If confirmed, he would fill the last open service secretary position within the Pentagon. Two previous administration picks for Army secretary withdrew their names from consideration earlier this year.

Vincent Viola, the billionaire owner of the Florida Panthers hockey team, dropped out of the running in February. The second appointee, Tennessee state lawmaker Mark Green, dropped out in May after facing criticism for controversial comments he has made on LGBT rights, Islam and evolution.