JUNEAU, Alaska (AP) — Democratic Senate candidate Mary Peltola denied Thursday that she knew anything about an effort to put another candidate on the Alaska ballot with the same name as the Republican incumbent as the Justice Department escalated a criminal investigation with new grand jury subpoenas.

"I just want to clear the air," she said at the top of a speech in a downtown bar in Juneau, Alaska's capital. "I knew nothing about any other candidate on the ballot except for me and the incumbent. That is all I have ever known about. I am not interested in tricking voters."

Peltola is running against Sen. Dan Sullivan. A person familiar with the matter told The Associated Press that subpoenas seeking grand jury t...