CNBC.com’s MacKenzie Sigalos brings you the day’s top business news headlines. As U.S. Covid-19 cases surpass 100,000 for the second day in a row, CNBC’s Meg Tirrell explains how Joe Biden plans to contain the pandemic if he wins the election. Plus, CNBC.com’s Brian Schwartz breaks down all the cash spent on the election, which has been the most expensive in history….