Here is more or less what I said:
Corporations are human creations; they are legal entities – created by the state, given certain privileges by the state, and regulated by the state. Unlike human beings, they can live forever; Unlike all of us, many of them make billions of dollars and may pay little or no taxes. There is no reason why they're spending on politics can't be limited through democratic means. Nonprofit organizations are limited in their political spending. Churches and charitable organizations are limited. So why not for-profit corporations?
All of us ordinary human beings face time, place, and manner restrictions – many of which I disagree with (and even if I think there are some fair time/place/manner restrictions; they are often enforced in a discriminatory or arbitrary way against ordinary people). Nonetheless, these courts have largely condoned such restrictions because there is a compelling state interest. Permit requirements, amplified sound restrictions, free speech zones, and nuisance laws – these are the hurdles to free speech most burdensome to us non-corporations. There is no more compelling interest than protecting democracy.
I asked the people assembled "who here likes democracy?" The response was unanimous.