General Discussion
In reply to the discussion: Colorado voter registration FRAUD caught on camera [View all]tblue37
(64,860 posts)determines which (if any) primary you get to vote in, except in states with open primaries. Also, if you are registered R or D, you'll probably get extra campaign lit from the party that thinks it can get your vote.
After the election, the pundits and analysts will create all sorts of (usually fairly silly) analytical narratives about who voted for whom and why. They will say things like, "In a heavily Republican district, Obama managed to get an unusually high number of votes, suggesting that he received a lot of cross-over votes from Republicans," or "It's no surprise that this district went so heavily for Romney, since registered Republicans outnumber registered Democrats in this district almost two to one."
How your vote is counted is not determined by your official registration (and of course, you can choose to not register as belonging to any party, but rather as an independent).
The only thing that might interfere with having the votes you cast counted for the candidates you cast them for is the pevalence of hackable electronic voting machines and the cheating Republican Secretaries of Stae and election officials in Republican controlled states.
Oh, and when they try to suppress the vote with various underhanded tactics, they go after those groups who are most likely to vote for a Democrat, but they make those choices on the basis of large registration numbers, not on the basis of your single Democratic registration.