text:  Live from NPR News in Washington, I'm Janine Herbst. President Biden gave a rare Oval Office address this evening, telling Americans to pause and cool down the heated political rhetoric. NPR's Deepa Shivaram reports the remarks were the third time Biden has spoken about the assassination attempt on former President Trump that took place yesterday. Biden says he will continue to speak out about the stakes in this election, but he says politics shouldn't become a battlefield.