Didn't Pres. Nixon do things that would be considered left wing or even far left, even though he was a total conservative Republican? One example was that he tried to freeze wages and prices. That could almost be called Marxism, and in fact caused the birth of the Libertarian Party.
I think before Reagan was president, presidents weren't considered "liberal" or "conservative" all the time. Nixon or LBJ just did what they wanted and didn't care which "aisle" it would be in.
There was even a joke in Star Trek VI when Kirk is sent to make peace with the Klingons. Spock says, "Only Nixon can go to China." Which was accurate since no one mistrusted the Klingons more than Kirk.
This trivia list talks about Nixon's achievements including the EPA which, again, today would be called "liberal":
http://www.google.com/url?sa=t&rct=j...7MM6j-in2Q_lfA
Nixon was a president who "took big bites."