Dr. Mehmet Oz, a celebrity heart surgeon, joined Fox News host Sean Hannity on Tuesday night to discuss his announcement to enter the U.S. Senate race in Pennsylvania as a Republican.

“America is in crisis, that’s not news. Our values are under attack,” he said. “So, I want to serve America in its time of need. I think I can do that by running for the U.S. Senate seat in the state of Pennsylvania.”

Oz lamented big government, saying that his political philosophy centers around “liberty and freedom and that to me means limited government.”