@djc so take Michgan’s “uncommitted” (13%) x 28% (nationally) registered Democrat gives 3.6%, which can effect a 7.2% point difference if they tell pollsters Trump rather than Biden as protest. Plus there may be voters who skipped the primary but who would have voted “uncommitted”, who might make the same choice if a pollster calls. Yes, I think the magnitudes are material relative to polling gaps.