I believe Iowa indies lean slightly D - I cannot confirm that. So with fewer I votes, that theoretically should be better for Blum.
I watched 4 Indy voters being interviewed on Fox & Friends and they sounded just like LIBS no difference between the two, DONT know why they registered Indy they were ALL 4 Dems!!!!
That would be my guess too “under normal circumstances”...but this year is anything but normal. As Potus said in Texas, this is “the election of Kavanaugh, the caravan, tax cuts, and common sense”. I think Independents will favor our side on those issues.