Not let this thread get wildly off topic here, however...
I've seen posters on both sides of the aisle break ranks with the "dogma" on a regular basis.
For example, Jim Jackson made some "conservative" points on the "Paris is Burning" thread today. On my end, while I make no apologies for being squarely on the right, I've also stated on more than one occasion where I part ways with Bush (Border Security, support of the Saudis, for example) and even a few times where I've said I thought Clinton's heart was in the right place (most recently on his 1995 Cuban visa policy).
On the other hand, I've seen a certain group of so-called "independents" who seem so eager to express that "independence" that they end up with, essentially, their own dogma of "bah, both sides suck", that they stick to with equal, if not more, dedication.