text:  WCVM Baltimore is top radio 680 AM and 99.9 FM in Harper County. Baltimore is listening. With SRN News, I'm John Scott. Tonight's presidential debate at 9 p.m. Eastern will be breaking new ground. What else correspondent Greg Clexton explains. When Joe Biden and Donald Trump face off this evening for 90 minutes, it will make history as the first debate between a sitting president and a former president.