David Zuckerman, a prominent member of the Progressive Party of Vermont, recently said he will run for Governor in 2020. He will be the first Progressive Party nominee for Governor since 2000. The party has existed since 1999. Zuckerman will announce formally on Monday, January 20. See this story.
In 2008, Anthony Pollina, who was and is a member of the Progressive Party, did run for Governor, but he ran as an independent, not as a Progressive.
Zuckerman was elected Lieutenant Governor in 2016 and re-elected in 2018. He was also the nominee of the Democratic Party, but his ballot label has always been “Progressive/Democratic”. In Vermont, the party listed first indicates the party of membership. Vermont doesn’t have registration by party. It does have aggregated fusion (this means fusion is permitted, but there is only one square on the ballot for each candidate).
Currently, the Governor of Vermont is a Republican, Phil Scott. Scott is running for re-election. Thanks to Gene Berkman for the link.