The polls, in fact, show that about half of likely GOP caucus and primary voters in Iowa, New Hampshire and South Carolina said they find opposition to gay marriage either "mostly" or "totally" unacceptable in a candidate. Fifty-two percent of likely Republican primary voters in New Hampshire and South Carolina said opposing gay marriage is either mostly or totally unacceptable, while 47 percent of likely Iowa caucus voters agree.Possibly because the likely GOP voters in IA, NH, and SC can include non-Republicans? Still, it's amusing to think that the GOP candidates will have to figure out how to thread this needle.
You also have to wonder just how much of a deal-breaker gay marriage support is. The poll asked about opposition to gay marriage -- not support -- so it's a little harder to suss out just how many people would vote against a candidate who supports gay marriage. We're guessing it's still more of a voting issue for those who oppose gay marriage than those who support it -- at least on the GOP side. (For what it's worth, though, between 25 and 31 percent of likely GOP voters in each state say opposing gay marriage is "totally unacceptable" -- a number that is on-par with all of these other issues.)