Dr. Oz says his celebrity 'a huge advantage' as he runs for Senate; says he's 'aligned' with GOP voters

In a crowded and combative Republican Senate primary that's become the most expensive race in the nation this year, Mehmet Oz has one thing that his rivals for the GOP nomination don’t have – massive name recognition.

Oz is one of the leading contenders among a number of well-financed candidates in the race to succeed retiring GOP Sen. Pat Toomey of Pennsylvania. It's a Senate battle in a key battleground state that could decide whether the Republicans win back the chamber’s majority in November’s midterm elections.