In the normal case, wouldn't a person usually vote in the next election the way they voted previously? A party's platform is generally the same election-to-ele

In the normal case, wouldn't a person usually vote in the next election the way they voted previously? A party's platform is generally the same election-to-election, and if I voted previously for that platform, I'd tend to continue voting for it unless I had a pretty significant change of heart--and then changed it again for the election following? Unless either the party or the voter swung wildly around, gerrymandering doesn't require "blind" allegiance to a party.