Alina Habba's role as acting U.S. Attorney faces a test after an attorney in a drug and weapons case filed a motion challenging her authority to prosecute it.

Federal court hearings, grand jury proceedings and plea deals were abruptly canceled in New Jersey over questions about whether Alina Habba, the acting U.S. attorney, was legally appointed.

President Trump's bid to keep Alina Habba in charge of the U.S. attorney's office in N.J. faces a new test after a defendant filed a motion challenging her authority.