[pandaman]

In US not only parties themselves don't vote but the people don't elect parties either. For example, we just had the most money spent in history on a primary (this is an election among multiple candidates in the same party), where some interest groups spent 25M+ to unseat a popular GOP representative in favor of another GOP candidate. If the choice was just between two parties nobody would have spent a dime to change one GOP rep for another GOP rep.