The voting power of any person will be meaningless once ai systems get the right to vote. I know it sounds far fetched but it will happen as it benefits the people with power for that to happen. And at that point a human voice has no say in anything...

The more frightening reality is people turning to AI to do research on who to vote for and the AI is silently told to influence them towards a party it candidate. Since it has past chat history it can utilize that to highlight topics you are interested in and personalize the arguments.