Democrats (barring any scandals or mistakes) Shapiro, Whitmer, Beshear, Wes Moore (he'll rise quickly) and Newsom.
Republicans - Nikki Haley, Ron DeSantis, Ted Cruz. Problem for them is - how close or far away from Trump do they want to be. Kansas voters just blew out a very Pro-Trump sheriff in a primary yesterday - one that was considered untouchable 4 years ago. Gotta be pro-Trump to usually win a primary, but it kills you in a General. In Kansas, the Republicans probably hold that Sheriff position because the Pro Trump guy is gone for the General.