Dana Milbank: Rick Santorum sees Nazis everywhere: in the Middle East, in doctor's offices and medical labs, in the Democratic Party, and now in the White House. Nazi comparisons are the most extreme form of political speech; once one ties his political opponents to the most deplorable chapter in human history, all reasoned argument ceases. Yet this is where Santorum exists, in a place of binary extremes of good and evil, where his political foe isn't just wrong but adheres to a "phony theology" not found in the Bible. His frequent tendency to go from zero to Nazi over ordinary political disagreements is typical of the emotional appeal he has to conservative primary voters, but it also shows why he's outside the bounds major political parties have applied to their past presidential nominees.
