NBC News Correspondents Ellison Barber, Blayne Alexander, Morgan Radford, Maura Barrett, Republican Pollster Bill McInturff, Public Opinion Strategies, Democratic Pollster Jeff Horwitt, Hart Research Associates, Pennsylvania Sec. of State Kathy Boockvar, Professor of Law at Stanford Law School Nate Persily, Kasie Hunt, Rich Lowry, Claire McCaskill, Kristen Welker