Republicans and Wars

Hypothesis: All successful Republican tenures are based on wars, and even many unsuccessful ones. Moreover, these wars either end up failing or having a huge cost in lives.
Examples: Lincoln (Civil War), Nixon (Vietnam), Reagan (War on Drugs, indirectly), Bush Jr. (War on Terrorism/Iraq)
Exceptions: Woodrow Wilson (D) (WWI), Franklin Delano Roosevelt (D) (WWII), Bill Clinton (D) (Gulf War, IIRC; this may be Bush Sr., can't remem)

Vietnam was more the result of actions by Kennedy and Johnson than Nixon. This hypthesis is worthless. Almost every single president, democrat and Republican has commited troops somewhere. The only ones who haven't are probably the like of Hoover, Taft and Zachary Taylor. Those utterly forgotten by history.