Politics tamfitronics Donald Trump tries to take back the election spotlight. U.S. track star Noah Lyles reveals a Covid diagnosis moments after a bronze-winning sprint. And the number of migrants coming into U.S. cities is declining.Here’s what to know today.Trump dares Harris on debates and interviews to reassert himselfMark your calendars — a debate between Vice President Kamala Harris and former President Donald Trump is set for Sept. 10.And there might be more to come. During a news conference at his Mar-a-Lago resort, Trump said he would be open to three debates next month.This is Morning Rundown, a weekday newsletter to start your day. Sign up here to get it in your inbox.Trump’s eagerness to debate — and the Florida news conference itself — are signs that he’s looking to reassert himself in...