The phrase "voting power" refers to the influence or control a person or group has when making a decision through voting. It essentially represents the ability to have one's preferred choice or opinion recognized and acted upon. Full definition
Recent technological companies went to IPO with publicly traded stocks that have 1 / 10th of voting power of the privately held stocks. (money.stackexchange.com)
They want real choice — the kind that comes with voting power. (educationnext.org)
But in this case, I have a system where the rich effectively have much more voting power than the rest. (politics.stackexchange.com)