Tuesday on the NewsHour, hundreds are arrested as pro-Palestinian protests spread across college campuses. A key witness takes the stand in Donald Trump's hush money trial after the judge holds a hearing into whether the former president violated his gag order. Plus, with national elections underway, we examine the ethnic violence that has killed hundreds and displaced tens of thousands in India. WATCH TODAY’S SEGMENTS: Colleges struggle with balancing free speech, campus safety https://www.youtube.com/watch?v=bsUqCr9mh6w News Wrap: Senate advances Ukraine aid bill https://www.youtube.com/watch?v=Ykf43Qvoq64 Hush money trial judge considers if Trump violated gag order https://www.youtube.com/watch?v=xu35SkpdI0o NLRB power faces challenge in Starbucks Supreme Court case https://www.youtube.com/watch?v=84aqhO4CmYA Indian government accused of ignoring deadly ethnic violence https://www.youtube.com/watch?v=hEg4kGQnLb0 U.S. effort to force TikTok sale faces complicated path https://www.youtube.com/watch?v=nF2p3wjExj4 Salman Rushdie reflects on attack in new memoir 'Knife' https://www.youtube.com/watch?v=xM0S6LFPGYk Subscribe: Newsletters: https://www.pbs.org/newshour/subscribe PBS NewsHour podcasts: https://www.pbs.org/newshour/podcasts Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG Find more from PBS NewsHour at https://www.pbs.org/newshour Subscribe to our YouTube channel: https://bit.ly/2HfsCD6 Follow us: TikTok: https://www.tiktok.com/@pbsnews Twitter: http://www.twitter.com/newshour Instagram: http://www.instagram.com/newshour Facebook: http://www.pbs.org/newshour 00:00 - Introduction 03:04 - Protests on Campus 16:27 - News Wrap 22:03 - Trump on Trial 28:55 - Labor at the Court 33:32 - India in Conflict 40:55 - Social Control 46:42 - "Knife"