The quote applies to actual positions, not to politically-based posturing.

That dilutes the quote to the point of uselessness. Probably most positions that people take involve posturing.

But if you really want a different example, how about homeopathy? I can't construct an argument for that which is coherent in the sense that was probably intended, although I could construct an argument for that which is grammatically correct but based on falsehoods or on obviously bad reasoning.