There is debatable evidence that right-wing radio and TV commentator Rush Limbaugh's "Operation Chaos" resulted in Sen. Hillary Clinton's narrow victory in Indiana's Democratic primary on Tuesday.Operation Chaos is Limbaugh's effort to encourage Republican voters to reregister as Democrats or cross over in primaries that permit it, like Indiana's. A vote for Clinton, in Limbaugh's master plan, assures an extended Democratic primary, weakening the eventual nominee.Of course, the egocentric bloviator is taking full credit for Clinton's win by only 14,000 votes in the Hoosier State. Limbaugh has a knack for taking credit for everything he promotes.Imagine if the Democrats were...