Democratic-led Senate committees are getting their chance to question General Services Administration officials over the agency's lavish spending scandal.
Their hearings follow two days of GOP hearings into an agency portrayed as running amok with taxpayers' money on the Obama administration's watch.
Lawmakers are demanding answers about excessive trips and wasteful spending by GSA officials.
GSA executive Jeff Neely, who was placed on leave, took dozens of trips for the agency. Neely's wife accompanied him on trips to Hawaii, Guam, and the Mariana Islands.
The trips were all paid for by taxpayers. Neely's wife, Deborah Neely, also handled party arrangements, directed event planners to spend government money, and arranged lodging for relatives on the GSA trip to Las Vegas in 2010.
Agency officials initially came under fire for attending a conference in Las Vegas that cost taxpayers more than $820,000.
The Environment and Public Works Committee is holding a hearing on GSA spending Wednesday, followed a few hours later by the Appropriations subcommittee that controls the GSA budget.