"We view this race as absolutely wide open, and Iowa is really going to solidify itself as the pivotal player," the person familiar with Pence's plans said. "It's a place that values Mike Pence's principles — traditional conservative principles — deep-rooted faith and uncommon character."

The former vice president will campaign in all 99 Iowa counties before the caucuses, the person said, adding that the campaign "will do the things that put Mike Pence in an advantageous position."