Democrats are overwhelmingly likely to pick up governorships in Illinois, where Gov. Bruce Rauner (R) is running a long-shot bid for reelection, and New Mexico, where Gov. Susana Martinez (R) faces term limits.
Polls also show Democratic nominees ahead in open seat races in Michigan, Maine and Florida; of the 33 public surveys taken in Florida since the Aug. 28 primary, Tallahassee Mayor Andrew Gillum (D) has led former Rep. Ron DeSantis (R) in 32.
In Nevada, Clark County Commission Chairman Steve Sisolak (D) is running even with or just ahead of Attorney General Adam Laxalt (R).
Two high-profile races in which Republican governors are retiring, in Ohio and Georgia, remain virtual toss-ups. Former Attorney General Richard Cordray (D) is tied with current Attorney General Mike DeWine (R) in Ohio, and former state House Minority Leader Stacey Abrams (D) is locked in an increasingly contentious battle with Secretary of State Brian Kemp (R) in Georgia.