Willie May will be the department's under secretary for standards and technology.
Senators are expected to take a procedural vote on Tuesday morning.
Members of Congress are seeking to ensure that taxpayers don't pay for luxury airfare.
"Destructive members" have forced Mitch McConnell’s hand, the Democrat said.
Sen. Amy Klobuchar (D-Minn.) said the legislation would help "foster" voting.
The bill is meant to include victims of sexual assault.
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.
The House plans a national security-focused May with votes in the coming weeks on the annual defense authorization bill, ending bulk data collection and empowering Congress to review the nuclear deal with Iran.