Even if you ban/regulate giving money to candidates, are you willing to ban the ability of citizens to buy ad time and say something political? Who defines what

Even if you ban/regulate giving money to candidates, are you willing to ban the ability of citizens to buy ad time and say something political? Who defines what "political" is? Would you ban: An ad that promotes preserving a specific forest while there is a referendum about increasing environmental spending. An ad that says the schools are falling apart and understaffed while an education millage is being voted on. An ad that says you shouldn't be forced to buy healthcare while a candidate/party's platform is strongly tied to that policy.