What We're Following This Evening

Editor’s Note: This article previously appeared in a different format as part of The Atlantic’s Notes section, retired in 2021.

Mayhem in Chicago: Fistfights broke out between protesters and Donald Trump supporters at a crowded rally inside the University of Chicago-Illinois Pavilion on Friday night after the Republican frontrunner canceled his appearance there, citing security concerns. Thousands of demonstrators also gathered outside to protest the candidate's visit to the city.

More Buckeye State voters: A federal judge in Ohio issued an order Friday allowing 17-year-olds to vote in the state’s primary elections next week. Bernie Sanders’ presidential campaign had filed a lawsuit against the Ohio Secretary of State’s office on Wednesday to nullify the state’s decision to block them from the polls.

Ulstexit?: Northern Ireland deputy first minister Martin McGuinness called Friday for a poll on Irish reunification if the British referendum to the leave the European Union succeeds, calling it a “democratic imperative.” McGuinness’s party, Sinn Fein, shares power in the Northern Irish government with the Democratic Unionist Party, a pro-British party that supports leaving the EU.

News from the afternoon here