People keep contending that it's difficult to differentiate what a political advert is, but actually that's the wrong question. You don't really need to ban political advertisements, you simply ban adverts from political organisations. The Federal government already has rules in place to determine what a political action committee is. So for a start you just ban all PACs, 501(c)(4|5|6)s and 527 organisations. That basically covers the overwhelming majority of political advertising, and then we can review later if we think it hasn't been effective.