Yeah MN Dems shouldn't try to exacerbate this or anything; they have nothing to gain and everything to lose by pushing the "rigged" narrative. Assist the dysfunctional MN GOP in getting Trump on the ballot so that the good people of MN can deliver him a good trashing at the ballot box fair and square this November.
I don't think MN dems should actively help the GOP by putting Trump on the ballot, but they certainly shouldn't challenge Trump being on the ballot if he in fact does qualify for it. They should just let the situation play out on its own