Billionaire investor said at Clinton rally in Omaha that Trump is "afraid" of voters finding out what's in his tax returns
GOP nominee sounds off on Russia and the possibility of a "rigged" election during a campaign stop in Ohio
CBS News polled voters on the candidates -- their readiness for office, their trustworthiness and other qualities
Authorities say the balloon, which was operated by Heart of Texas Hot Air Balloon Rides, hit high-tension power lines before crashing into a pasture