 Live from NPR News, I'm Dale Willman. President Biden spoke from the Oval Office tonight to warn of the risks of political violence in the U.S. and he said it's time to cool down. His call comes one day after the attempted assassination of former President Donald Trump during a political rally in Pennsylvania. Republican convention will start tomorrow. I've no doubt they'll criticize my record and offer their own vision for this country. I'll be traveling this week making the case for our record and the vision, my vision of the country, our vision.