Meet the Press

A person of interest has been identified by law enforcement in connection with the mass shooting at Brown University, three senior law enforcement officials briefed on the investigation tell NBC News. Trump defends his economic policies amid waning poll numbers. Dr. Peter Hotez says cuts at HHS could harm pediatric research and health care.

Rep. Mike Lawler (R-N.Y.) explains his decision to join Democrats to force a vote to extend the Obamacare subsidies. Canadian Ambassador to the U.S. Kirsten Hillman discusses why she’s stepping down from her role amid trade tensions between both countries. Officials provide an update on the manhunt for the Brown University shooter.

Nick Reiner is expected to be charged with two counts of first-degree murder for the death of his parents Rob and Michele Reiner. Rep. Pete Aguilar (D-Calif.) discusses the last-ditch efforts in the House to address expiring Obamacare tax credits. White House Chief of Staff Susie Wiles responds to an extensive Vanity Fair article, accusing the publication of taking her comments out of context.

A manhunt is underway in Providence, Rhode Island after two students were killed and nine others were injured in a shooting at Brown University. 15 people are dead in Sydney, Australia following a mass shooting that authorities claim targeted the Jewish community. Director Rob Reiner and his wife were killed overnight, with authorities saying his son now in custody. NBC News Chief Data Analyst Steve Kornacki looks at the latest polling from the NBC News Decision Desk.

Sens. Raphael Warnock (D-Ga.) and Rand Paul (R-Ky.) join in the aftermath of a shooting at Brown University. Tom Winter updates on the suspect in custody. Steve Kornacki breaks down a new NBC News Decision Desk poll. Lanhee Chen, Jonathan Martin, Amna Nawaz and Neera Tanden join the roundtable.