Willie May will be the department's under secretary for standards and technology.
Senators are expected to take a procedural vote on Tuesday morning.
"Destructive members" have forced Mitch McConnell’s hand, the Democrat said.
Sen. Amy Klobuchar (D-Minn.) said the legislation would help "foster" voting.
Senate Majority Leader Mitch McConnell (R-Ky.) faces a tough decision on legislation that would allow Congress to weigh in on a final nuclear deal with Iran.
Senators will try to move forward on legislation allowing Congress to review the Iran deal.
Jordain Carney 05/02/15 12:12 PM EDT
McConnell could file to end debate on the Iran bill, or he could allow a controversial vote.
Obama vetoed a resolution of disapproval on a regulation to speed up union elections.
The legislation has been slowed by debate over dozens of amendments.
Sen. Mitch McConnell said the budget can help repeal the "failed policy" of ObamaCare.