Trump claimed Monday that any agencies saying not to respond to the email were doing it "in a friendly manner."

Before the weekend, the White House felt confident that coordination had been improving between senior staffers and Musk, two of those people said. In the first weeks of Trump’s new administration, some White House officials had expressed concerns over the tactics of Musk’s Department of Government Efficiency,

President Trump signed an executive order Tuesday aiming to expand the White House’s authority over various independent regulatory agencies, a move likely to prompt legal challenges. Trump issued

The order weighing on the federal agency's independence could also have implications on enforcement activity, concerned observers say.