Ed Martin came barreling into the U.S. Attorney’s Office in Washington, D.C., sending warning letters to Democratic lawmakers, terminating prosecutors who worked on Jan. 6 cases, and deeming himself President Donald Trump’s lawyer.

As interim head of the office, Martin is now aiming to assume the U.S. attorney role permanently. But the reactions to Martin’s unconventional behavior, from support to skepticism and dismay, suggest his path to Senate confirmation could be rocky.