With the Vermont senator kicking off a nine-state tour on Friday with stops in Iowa, South Carolina, Nevada and California, a sizable contingent of the people who helped build his insurgent 2016 campaign is ambivalent about a second run, according to interviews with more than a dozen former staffers. Many of them are looking for a different progressive champion to finish what Sanders started.

Sanders should just declare victory, they said, content in the knowledge that much of his 2016 platform has been adopted by other ambitious Democrats considering White House bids. Plus, he’s a white man who would turn 80 in his first year as president, who’d be trying to lead a diverse party fueled by the energy of young voters, women and people of color.

“I think that if a younger candidate can pick up the mantle and have Bernie’s support, I think that would be a better option for 2020. I feel like 60 to 70 percent of former staffers are looking around for another Bernie-esque candidate this time around, even if it’s not him,” said Daniel Deriso, a field organizer for Sanders’ 2016 campaign who went on to help run a successful insurgent mayoral campaign in Birmingham, Ala., last year. “But if Bernie called me to have me work on the campaign then I’d do it.”