Two United States Senators with very different backgrounds and accomplishments:
1) Joseph McCarthy. Vilified by liberals since the 1950's for his investigations into Communist infiltration of the U.S. government, but was later vindicated when the Russian government released secret KGB documents after the Soviet Union collapsed. "McCarthyism" is named after him.
2) Eugene McCarthy. Ran for the Democratic Party's Presidential nomination in 1968 and opposed the war in Vietnam.
"I'm giving you an 'F' on your paper on Senator McCarthy."