Republican Alaska Gov. Mike Dunleavy has ordered an investigation into the Democratic candidate running for the U.S. Senate in the state after revelations that her campaign appeared to be involved in recruiting another candidate with the same name as Republican incumbent Dan Sullivan.

Dunleavy's order, posted overnight on social media, comes a day after President Donald Trump called for the criminal prosecution of Mary Peltola and her campaign.

In a race that's among a handful of Senate contests this year expected to determine control of the chamber, the Republican president had previously directed his Department of Justice to sue to block certification of it, demanding that Alaska be prevented from certifying a win by Peltola if Daniel J. Sullivan Jr. remains on the state's ballots.