Oh, well, I'm convinced now.
"Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the government for a redressd of grievances."
Note that I did not say that campaign finance reform would violate the constitution, I said that "widespread prohibition of political contributions" would.
Given that the current system of lobbyists running the country is so utterly removed from what the Founding fathers intended, I'd say your interpretation of that quote is flat out wrong.
By limiting corporate corruption in our government, no one's free speech is being limited at all. That is Right Wing spin and you know it.