It is illegal to make false claims in a TV or radio commercial unless you are running for political office.
If you’re selling toothpaste, your claims must be vetted by legal and medical professionals. But not if you’re selling a candidate.
If you’re selling a candidate, not only can you lie about his record, but more to the point, you can lie about his opponent.
Not a bad idea — forcing candidates airing political ads to substantiate their claims. We’d get rid of the “my opponent molests collies” ads. (Unless your opponent is Judge Smails and Ty Webb has some real proof)