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.

The transportation secretary, Sean Duffy, said the Federal Aviation Administration had used a backup system while it addressed the problem.

Marc Molinaro, a former Republican congressman, would steer the Federal Transit Administration, which supports mass transit systems nationwide.

The New York City tolling program began on Jan. 5 after defying obstacles for decades. A move to stop it would likely touch off a legal battle between the state and federal government.

The Transportation Department said in a lawsuit that two of the airline’s routes were consistently delayed in violation of federal rules.

Sean Duffy, a former Fox Business host and Wisconsin congressman, would oversee a sprawling Transportation Department that oversees aviation, rail and transit.

The Transportation Department’s first ever penalty for chronic delays takes aim at four routes that consistently arrived late for five consecutive months.