in Minnesota, a state that has not been won by a Republican since Richard Nixon.  Their internal polls must be showing Minnesota is in play for Trump.  

It's more like Minnesota is playing Trump..

Its the mail in ballots that might not be counted. Biden needs to go there to insure same day voting.

A segment on Lawrence O'Donnell's show tonight showed footage of a Miami/Dade post office with box upon box of ballots that have been sitting there for a week. The courts are now involved and we can only hope there's time for them to be processed and delivered.
The fix is in, courtesy of DeJoyboy.

you and others here would be blasting him for taking the state for granted,

In PA too.  
USPS gummed up by De fucking Joy!!!

in Miami-dade, then its for Biden.  That's the most Democratic county in Florida.  Postal Workers are Federal employees, not state, so DeSantis has no sway  over the ballots.

Biden needs as many votes as he can get in Miami-Dade to counter the Trump votes in the many Red areas of the state. And who said DeSantis had anything to do with this? I said DeJoy.
You seem to have an inexhaustible supply of Red Herrings.

So Biden is going to Minnesota because he needs supporters to vote in person. That’s a problem for the Biden campaign because they’ve sunk so much time, effort and money into their virtual campaign apparatus, they’ve ceded the ground game to the Trump campaign.  Trump’s GOTV operation is much more robust than in 2016, and if it’s a close election, it will be Election Day turnout that swings the election to Trump.

A new poll by Opinium, for the Guardian, shows Biden winning the popular vote 57-40, i.e. a 17 point advantage. Even though several recent polls have shown double-digit leads, few have gone past +10, and no others have gone beyond +13 (+14 for the USC/Dornstrife panel).

Cheer up! Don't be so blue!