James Rainey and Hailey Branson-Potts | (TNS) Los Angeles TimesIs he rambling? Indifferent to his audience? Exhibiting symptoms of cognitive decline? Or, instead, could former President Donald Trump’s extended discourses demonstrate his genius — an ability, as he says, to “weave” disparate stories into a beautiful tapestry?The 78-year-old Republican nominee’s meandering speaking style — and…