In the United States it's already like that, I mean... kind of...
There are two parties which are pretty similar to one another...
With no exaggeration, in Europe people have always voted for the parties. Not for the people.
I recall my aunt saying: I will always votes for the Partito Socialista, I don't care who its leader is.
I grew up in a politically mixed family. My father and his side of the family always voted Republican. My mother and her side of the family always voted Democratic. I don't discuss my political views with anyone in my family anymore.