[jwalsh07]

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 redress of grievances.

[Luis Gonzalez]

No one is taking away the right of the people to peacebly assemble. No one is disbanding the NRA, they just have to disclose the source of the money used to buy the ad.

That means that Greenpeace can't buy an ad calling Bush an enviro-rapist using money from that guy who runs RJ Reynolds. They would have to prove that the money came from PEOPLE, exercising their First Amendment right.