Support for gay marriage has passed 50 percent for the U. S. overall, according to some polls.
A USA Today/Gallup poll showed:
Favor marriage- 42%
Civil unions- 25%
No legal recognition- 28%
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Independents
43, 26 and 25% respectively
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19% of white evangelicals support gay marriage
52% of mainline Protestants " " "
35& of Black protestants " " "

Al of these figures vary considerably from state to state.

Votes like those in the Kansas House reflect efforts to attract certain groups of voters, more than they reflect general voter belief.