Citizens United was a massive win for the people against the media companies. Without it the media companies get to decide everything people hear because nobody else is allowed to put forth anything like that level of resources toward political speech. That's why you always hear the media whinging about it -- it's the only way anybody else has any hope of challenging their narratives in front of more of an audience than an individual YouTube channel.

Obviously the poor have no money to buy ads with, but we're not talking about the poor here. Nobody seriously running for office is poor. This is a battle between people who are rich enough to buy ads on a TV network and people who are rich enough to buy the TV network, and Citizens United is a win for the "little guy" in that situation.

The big problem we have in elections isn't that someone can be heard too well, it's that some people can't be heard well enough. But the answer to that is public financing of elections, which doesn't require restricting private speech in any way.