It doesn't look like there were any No on 26 coattails in Mississippi as Dupree went down to defeat, and GOP gained seats in legislature. In 1948 when Massachusetts voted down a law to legalize birth control in a referendum, it was the Democrats and President Truman who benefitted with the big Catholic no vote. Kind of ironic that Dewey and the GOP were hurt by the huge anti-birth control vote then in 1948, but the parties and issues are a little different in 2011 I guess.
Dupree and almost every Democratic legislature candidate supported 26.
Which is hilarious in retrospect. Hindsight being 20/20, perhaps they could have benefitted by campaigning against it on an anti-big gov't angle. Also, what kind of birth control was available in 1948. I thought the pill wasn't invented until about 10 years later.