Approve political campaign ads?

Given the fact that many campaign ads are factually incorrect, would it not be a good idea for all ads that come directly from the campaign to not only be “approved” by the candidate, but also to have been cleared by some sort of Q&A organization verifying that they are actually accurate and fact based? Would this be workable in the real world? What says you?

Good luck trying to find a “clearing house” both sides can agree to accept.