My aunt and uncle know a couple who are one Republican and one Democrat. The story is that they go into the voting booths and yell at each other (good-naturedly), "I'm canceling your vote!"
Our house isn't divided by party lines, although we disagree on a number of things politically. So, today, I told Ryan that I canceled his vote. Haha! Seriously, I didn't decide until today who I was going to vote for.