The Democrat domination in this state always depended upon an uneasy alliance between the urban liberals and the Iron Range union members.
The solidarity between these two groups on issues fractured some years ago. For the last ten years, what loyalty has remained was mostly bought. With the Dems out of power at the Capitol, they no longer have the power to buy loyalty.
The DFL precinct organizations have been falling apart. The far-left crowd has descended into paranoid delusions, and their driving the majority of the party away.
It's possible that the Dems will pull it off, come November. But I'd put the odds against them.