Despite Trump winning Michigan over Harris by about 1-1/2% of the vote, the situation here is the opposite you describe in Georgia.

After the 2016 debacle with Clinton getting trounced and her campaign doing a terrible job working locally, our now-retired senator Debbie Stabenow and our outgoing state party chair Lavora Barnes, put together the "One Michigan Campaign" which involved vertical involvement and engagement within the bound of the law which has some separation between federal level and state/local candidacies. The result was that Michigan put Democrats at the top of state government with our Governor, Attorney-General and Secretary of state in 2018. Then in 2020, the Democrats took a trifecta for the first time in fifty years winning majority in both chambers of the legislature while still having a Democratic governor. We maintained that in 2022, though the GOP took back the state house with a slim majority this past November.

All organization flows from the county parties of which I am an active member here in Kent County, base in Grand Rapids, Michigan. Neighboring counties of Ottawa and Muskegon are just as active and I presume more populated counties on the east side of the state are also.

Unfortunately some of the more rural counties barely have activity given their deep red-ness to which people even exclaim "there's a Democratic Party in Newago?"