The problem with this proposal is that it specifically puts restrictions not just on speech in general, but on
political speech. Allowing the government to mandate the content of political speech and media would set a dangerous precedent for the future, even if that wasn't the intent of the amendment.
And while technically speaking requiring that the LeafStorm News Network has to provide equal airtime for all political candidates might be more "fair," if I own the news network I should be able to accept or reject advertisers as I see fit, and if people don't think it's fair they can start their own news networks. Now if I voluntarily said, "I'm providing ten minutes of ad airtime each day for the candidates in this race free of charge, with no extra advertising permitted, and no PACs either," then that is well within my rights as a network owner, but it's not something we should require everyone to do.