U.S. TV networks, amid strong ad sales, boost coverage for Trump's convention

U.S. TV networks, buoyed by strong demand from advertisers, are adding hours of coverage for this week's Republican National Convention compared to four years ago and planning to use social media to capture any unexpected moments, executives said. Presumptive presidential nominee Donald Trump may be new to politics. Adding to the programing uncertainty are protests outside the convention hall in Cleveland and the possibility of dissent among delegates.