Protesters hold a rally in support of Palestinians, amid the ongoing conflict between Israel and the Palestinian Islamist group Hamas, outside the Columbia University, in New York, U.S., November 15, 2023. REUTERS/Eduardo Munoz/File Photo Acquire Licensing Rights Nov 16 (Reuters) - The American Civil Liberties Union challenged Florida's ban on pro-Palestinian university groups, arguing in a federal lawsuit on Thursday that the state is violating students' free speech as tensions roil U.S. campuses over Israel's war with Hamas. Florida’s university system, joined by Governor Ron DeSantis, last month ordered colleges to shut down chapters of Students for Justice in Palestine...