Some of the patterns in that map are very strange...
Well it WAS 1990. Plus Perpich was from northern Minnesota and Carlson from Minneapolis. But yes, seeing Wright and Sherburne counties vote Democratic while Hennepin and Ramsey vote Republican looks quite bizarre today.
Another oddity: Houston county (the one in the southeasternmost corner.) It voted for Perpich, yet tied for Sec of State the same year. The Democratic incumbent for SoS won every other county in the state except one (Martin). So why it would vote for a losing Democrat when the rest of the region votes Republican but literally tie in a race where the Democrat is winning in a landslide is beyond me.