text:  Creators of MATLAB and Simulink software, accelerating the pace of engineering and science. Learn more at mathworks.com. From NPR and WBUR Boston, I'm Deepa Fernandes. I'm Anthony Brooks. It's Here and Now. Coming up, investigators search for a motive behind the weekend assassination attempt of former President Donald Trump as President Biden appeals for calm and national unity. You know, the political record in this country has gotten very heated. It's time to cool it down.