Today's edition of quick hits:
* A brutal mass shooting: "A shooting at a backyard party that killed five and wounded three in a Pittsburgh suburb was planned and calculated, a prosecutor said Thursday."
* Madness: "A man has been charged with assaulting a protester at Donald Trump's Fayetteville, North Carolina rally Wednesday night. John McGraw, 78, of Linden was arrested Thursday morning after assaulting Rakeem Jones, who had been protesting at the event."
* Related news: "A man charged with assaulting a protester at a Donald Trump rally Wednesday night says the protester deserved it. 'Yes, he deserved it. The next time we see him, we might have to kill him,' said John McGraw, 78, in an interview with 'Inside Edition' on Wednesday night."
* Related violence: "Republican presidential frontrunner Donald Trump's campaign manager said Thursday that the Breitbart reporter who alleged that he forcibly grabbed her by the arm was an 'attention seeker.'"
* Flint crisis: "Gov. Rick Snyder on Thursday released more than 1,000 more pages of e-mails and other records related to the Flint drinking water crisis. The four additional batches of Executive Office e-mails and related materials are from Snyder's briefings regarding the matter from 2011 through Jan. 5, when the state declared an emergency in the city."
* The final vote was 94 to 1: "Responding to an urgent drug crisis that has contributed to more American deaths than car crashes, the Senate on Thursday overwhelmingly passed a broad drug treatment and prevention bill, the largest of its kind since a law in 2008 that mandated insurance coverage for addiction treatment."
* Given the makeup of the 5th Circuit, this is not a positive development: "A federal appeals court announced Wednesday that the court's full bench will consider the issue of whether the Texas voter identification law violates the Voting Rights Act or the Constitution."
* Diplomacy: "Justin Trudeau, the prime minister of Canada, met with President Obama on Thursday for the first official visit by a Canadian leader in 19 years, a diplomatic honor made possible in part by new pledges of cooperation on combating climate change. Mr. Obama and Mr. Trudeau announced Thursday morning new commitments to reduce planet-warming emissions of methane, a chemical contained in natural gas that is about 25 times as potent as carbon dioxide and that can leak from drilling wells and pipelines."
* Obama's rolling out the red carpet, too: "Although Canada and the United States are each other's largest trading partner and though they share the world's longest border, Obama never hosted Trudeau's predecessor, the conservative leader Stephen Harper, with an official state dinner, and it has been 19 years since any Canadian leader was treated to the pomp and guest list of a state dinner."
Anything to add? Consider this an open thread.