So you agree that I have the right to say that the current president is an oath-breaker, a war monger and a criminal (these opinions are biased, clearly, but they are also not completely impossible to argue)?
So you agree that I have the right to tell that to somebody who wants to hear that, right?
So I also have the right to tell that to two people who wants to hear it right?
So what about 200? What if I convince somebody else to say that to ten people, 200 people? If I convince ten people to tell 2000, and pay them what they would have earned if they had worked a job that day, then I should also be allowed to do that, right?
Remember I could have hired them to paint my fence instead, which would have been allowed.
What if instead of sending people around, I started sending letters around? And to write them fast enough brought an expensive printer? And the advice from expensive (but) great ad men from Madison? And instead of using letters I brought time on the radio or the television or on various sites online?
If you allow me to do these things (and remember I could do it if, rather than getting some particular policy past the House, I wanted to sell blue cheese) then how will it matter whether I can give money to a particular candidate or not?
You can have either free speech or banned campaign founding but not both.