As much as I may agree/disagree with the topics of the campaign ads, I really don't think these (probably) polemic video snippets are as significant as the people pushing them pretend they are.
I think politicians need to stop demanding private companies allow them to say what they want, when they want, how they want. There are plenty of other advertisements that are rejected- companies have discretion over what they choose to accept, as they should.
Ultimately if politicians want to bring a subject to people, they should figure out other ways of doing so. Additionally, I really don't think anyone with or without a stance is going to be swayed by a 30/60/90 second ad. A short ad on a streaming platform also isn't going to bring discussion or encourage real responses from people besides (probably) irritation.
Ultimately regardless of the message contained, Hulu has the say over what content they want to be associated with. Maybe it isn't even about the topics presented, but about the politicians and political campaigns in general.
Personally I would be irritated to see campaign ads, from either duopolist party- I'd rather not watch it as none of them have anything worth saying most of the time. I wish they'd take their campaign money, use it elsewhere, and stop making a big ado about people not wanting to do what they want- that goes for both Democrats and Republicans- acting like there's some kind of persecution happening, while hypocritically at the same time both are doing their very best to stifle anything outside their big tents.