The decision to step down confused some Republicans, but others suspected the move had something to do with the House GOP Steering Committee not giving her a coveted post on the House Ways and Means Committee, according to two people with direct knowledge of the matter.

Spartz, who has had problems with retaining staff, said she’d prefer to “spend more of my time helping” the mission of the so-called Department of Government Efficiency, which is meant to help cut government spending.