Question

Casey is unhappy about the quality of education in his town, so he organizes a large rally outside of the school board meeting. Which amendment to the Constitution allows Casey this right to protest?

Answer 1

The first Amendment, which is freedom of speech.

It always 'Casey' to organize a rally, HOWEVER, it can be limited. As long as he doesn't threaten, harass, cause harm to other citizens, and etc, he is protected by this amendment.