Politics are "allowed" as is most everything here (my definition of "not allowed" implies that moderators disappear posts and comments which are not allowed). There are certainly people who disapprove of politics on LW, but for any X it's pretty easy to find people who disapprove of X.

The only thing you risk here by bringing up political topics is your own karma as you should expect to be downvoted.

The governing rule is not "don't mention politics" but "don't be stupid".