The once-obscure Office of Personnel Management, essentially the human resources department of the federal government, is now ground zero for Elon Musk and President Donald Trump’s efforts to slash bureaucracy and deconstruct vast portions of the administrative state.

The lawmakers said in a letter that agency heads should immediately tell staffers to not respond to OPM’s “ill-conceived email stunt” asking them what they accomplished last week.

A threatening email sent by Elon Musk to millions of federal employees on Saturday backfired after opponents of the billionaire began spamming his inbox. In the email, Musk ordered government workers to respond with their weekly accomplishments by the end of Monday or face potential termination.