Writer John Judis on the Decline of American Conservatism

New Yorker writer Dexter Filkins says President Trump's current national security adviser is a hawk who sees America as "a colossus operating anywhere it wants."

David Brock is the author of the best-selling memoir Blinded by the Right: the Conscience of an Ex-Conservative. Brock defected from the Republican Party in the latter half of the 1990s and came to renounce the anti-Clinton movement in which he took part. His new book is The Republican Noise Machine: Right-Wing Media and How it Corrupts Democracy. He now heads a nonprofit media watchdog organization in Washington, D.C.

Robert Walker, a retired congressman from Pennsylvania who served as chairman of the Science Committee, responds to allegations that the Bush administration has mishandled scientific issues. Walker now serves as chairman of Wexler & Walker, a lobbying firm in Washington, D.C.