WASHINGTON (AP) — Mitt Romney's extensive resume has many Republicans looking to him to take on a role in the Senate as a political and moral counterweight to a president many in the GOP see as divisive and undignified.

First he has to get elected.

The 2012 GOP nominee for president announced Friday he is running for the Utah Senate seat being vacated by GOP Sen. Orrin Hatch.

Romney, 70, is among the best-known names in U.S. politics. He has been a successful businessman, governor of heavily Democratic Massachusetts, Olympics rescuer and, more recently, one of his party's fiercest critics of P...