Speaking to William F. Buckley, Jr., July 25, 1977:
Now, you know—you’ve traveled the world as I have—the one thing about left wing politicians is they are always fanatical. They never let go. It’s their religion.
She went on to describe their disproportionate influence on the British Labor Party. We can see this universal characteristic of Left Wing politics (it's their religion) in action today, as the Democrat Party in America is utterly beholden to the most fanatical wings of their base. This is documented in Jay Cost's very recent book, Spoiled Rotten: How the Politics of Patronage Corrupted the Once Noble Democratic Party and Now Threatens the American Republic.
P.S. You can now find a gigantic archive of William F. Buckley's television show, Firing Line, on your Amazon streaming account. If you're a Prime member, you can watch them free!