Earlier this summer, a progressive organizing group in Iowa circulated a questionnaire to the field of Democratic presidential candidates. Among other things, it asked would-be nominees whether or not they would support a ban on the construction of new concentrated animal feeding operations, or CAFOs, sometimes called “factory farms,” and the expansion of existing ones.

Five expressed their support for a ban on CAFO construction: Senators Elizabeth Warren and Bernie Sanders, Representative Tulsi Gabbard, Julián Castro, and Marianne Williamson. Former Vice President Joe Biden’s campaign never responded to the questionnaire. South Bend, Indiana’s Mayor Pete Buttigieg completed the questionnaire but did not commit to supporting a moratorium. (It should be noted that expressing support for factory farm bans on a questionnaire is a far cry from passing legislation. Still, the candidates’ responses are revealing, especially considering that Iowa—where they’ve spend much of this month—is the nation’s number one producer of pork.)

The candidates have spoken, sort of. But what do voters think? Might factory farm regulations become a winning issue at the ballot box? (Spoiler alert: Probably not). A new poll, commissioned by Johns Hopkins University’s Center for a Livable Future and released Tuesday, surveys voter sentiment on banning CAFO construction for the first time. Polling group Greenberg Quinlan Rosner surveyed 1,000 registered Democrats, Republicans, and Independents from across the nation and found that 43 percent of respondents favored a national ban on the creation of new factory farms, as opposed to 38 percent of respondents who oppose a ban. But in Iowa, where more than 400 additional registered voters were asked the same questions, sentiment flipped: more people opposed a ban than favored one.