If you were Hubert Humphrey's campaign manager in 1968, what would you have done

[State's Rights]

Hubert Humphrey would have been unable to label Nixon as a "reckless superhawk" (which isn't even a real word), because Richard Nixon had painted himself as the "Anti-War"  candidate. Of course he wasn't, but he imaged himself out to appear so. In fact, Nixon's promise to the American people was that he would end the war in Vietnam (notice he didn't say how he would do so). I also don't see how reminding undecided voters (who were primarily White Democrats in the Rust Belt) of the good economy would do much good, as that was Humphrey's basic strategy to begin with.