Currently about 5 to 10% of university faculty members are libertarian or center-right in political view. If tenure were abolished, do you not think that nearly all of these few would soon be dismissed and replaced by minions or co-conspirators more congenial to the reigning liberal (meaning social elitist, forced multiculturalist) viewpoint. A handful of libertarian useful idiots and a few neoconservatives (liberals for war) would remain on the “right”.

Nearly every non-conforming university faculty member can be replaced by a cheaper H1B visa holder or a leftist with lucrative contacts in DC.

Is this what you want??
Remove tenure and this is what you get.

This would be a good argument if it were true, which it’s not. Lawsuits about denials of tenure (1) are among the most impossible to for a plaintiff to win, and (2) are rarely filed because suing your university would turn you into a pariah. Because academia is one of the fields of employment with the lowest risk of litigation, I see little reason to think that schools will change their whole employment structure (i.e., the tenure system) based on a quite minimal litigation threat. I’ve written about this, citing all the cases applying an “academic deference” doctrine to explain why such cases almost always lose: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=892806