Some have halted work on the Biden-era $5 billion program to build E.V. charging stations. Others plan to keep building. Most are confused.

Mr. Chopra, long a target of criticism by Republican lawmakers and banks, has not yet been forced out. “I swore an oath to a five-year term,” he said this week.

The tech billionaire and top Trump ally visited the General Services Administration, which appears to be a key part of his crusade to cut the cost of government buildings.

The Trump administration’s effort to get federal workers to leave their posts could lead to an exodus of experienced employees, some warned.

The rebranding of a former White House digital office into the new Department of Government Efficiency signals its potential limits, budget experts said.

The billionaire decided he could not campaign while helping lead the so-called Department of Government Efficiency, but tensions with Elon Musk were also evident.

Scott Turner, a former pro football player and official during the first Trump administration, will make his case to lead the Department of Housing and Urban Development.

Mr. Musk has turned to Silicon Valley to help recruit executives who will take up unofficial positions across the federal government.