Following up on this front-page report in Saturday’s Los Angeles Times, the Washington Post has run this report and the New York Times has run this report.
It is certainly unusual for a broadcast station to run what amounts to a long commentary against a candidate for federal office. (I give some statistics in my “Rupert Murdoch” article on how rare it is for broadcast stations to endorse candidates for office). But—from the point of view of federal election law (as opposed to, say, federal communications law—this is really no different from the New York Times endorsing a candidate for president (or running an oped supporting or opposing such a candidate).