Simply as a matter of human decency, the White House might refuse to do business with CBS News until Dan Rather apologizes on the air for peddling his crude forgeries.
There is no reason to do business with con men or fraudsters. It would set a good example for the rest of the country, indeed the rest of the world, if the White House declares CBS News off-limits until this matter is resolved.
Once apologies are made, and measures taken to guarantee this sort of thing never happens again, normal relations could resume, with lessons learned on all sides.