Most swing states had semi-decent GOP governors in 2016.
With election-rigging RAT govs. in MI, PA, WI, and possibly NV and AZ, there’s not much of a chance that 2016 could be repeated.
It will take a major economic catastrophe (as well as changes of management in the State-Controlled Media Complex), to get the GOP back into the WH in the next several elections, no matter who runs.
I’m not sure there will be many elections in the future.