Lots of them.

Regulars:
The Adam and Dr. Drew Show
ABC News This Week
Meet the Press
Short Circuit (published by the Institute for Justice, a sorta-bi-weekly discussion of significant circuit court decisions)
We the People (published by the National Constitution Center, a discussion of constitutional issues)
Intelligence Squared (debates on a wide variety of issues, the winner being the side that changes the most minds)
Skeptoid (skeptical podcast discussing pop culture topics and historical legends, examining them for their veracity)
Skeptic's Guide to the Universe (skeptical podcast discussing any number of topics, interviews with guests, what's this sound?, Science or Fiction, all around fun)
Federalist Society Events