Citizen participation in Ancient Athens differs from that in
the United States in that the Greeks had direct democracy and effectively
direct participation of people in government whereas the United States has
representative democracy. This means that citizens vote for people that make
the decisions in government
Please responded violently to the protesters
Protesters became aggressive in expressing and their views
I'm not a 100% sure but I think the last one may be correct as well that the protesters were angry about the war in Vietnam
Mainly Thomas Jefferson and James Madison.
I hope this helps!