3 PM ET: Trump targets GOP critic, fatal roof collapse, brain stimulation headset & more

Former President Donald Trump’s violent rhetoric against one of his political foes is sparking outrage. Police chiefs in battleground states are making new plans to secure elections. Rescue workers are searching for victims following a tragic roof collapse at a train station. A White Marine veteran accused of killing a homeless Black man on a subway last year is on trial. And, we’ll tell you about a new a medical device that could help relieve symptoms of depression at home.

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