Of the 76 Democratic county party leaders who responded to the survey, 43 said they would prefer a young candidate. They said they want a fresh face and expressed interest in potential candidates who haven’t run for president before. They yearn for a nominee with the energizing charisma of President Barack Obama to counter President Donald Trump’s rowdy base. Most said gender wouldn’t be a determining factor.

Those are hurdles that could trip up three of the best-known potential candidates, former Vice President Joe Biden, and Sens. Bernie Sanders of Vermont and Elizabeth Warren of Massachusetts, each of whom will be at least 70 years old when Iowa Democrats caucus in February 2020.

“They’re all too old,” said Chris Henning, the 71-year-old Democratic chairwoman in Greene County. “It’s not white bread America any more, we’ve got to get with the program.”