Chittenden County State's Attorney T.J. Donovan said Tuesday he had considered running against Sorrell, but he decided it was not the time for him personally or professionally.
Donovan challenged Sorrell in the 2012 primary, which Sorrell won by a narrow margin.
Donovan says a lot of the issues he campaigned on two years ago have become law, such as a "good Samaritan" law that provides immunity for prosecution for someone who calls 911 to report a suspected drug overdose. And he says he's pleased Gov. Peter Shumlin is now treating drug addiction as a public health issue.
Sorrell is expected to seek re-election.