 In a new interview, President Biden says he does not know if the Trump shooting will change the election. CBS News Special Report, I'm Matt Piper. Stay with us here, your election source, WTOP and WTOP.com for the latest. We've had another record-breaking day for heat. Reagan National reached at least 101 degrees, and at times today it felt like 110. It's because of something called the Heat Index. WTOP's Scott Gellman has been out and about in Northern Virginia asking people whether they know the difference between actual air temperatures and the Heat Index.