Premise: Chambers developed increasing reservations in his later years about the direction the American right was taking, distancing himself first from Joe McCarthy, then from Richard Nixon, and even from William Buckley Jr.'s National Review . But Chambers' importance lies, finally, not in his politics but in his romantic penchant for the extremes of the psychic and political undergrounds.

Hypothesis: Chambers built a wall between himself and McCarthy and Nixon.
Relation: entailment