By Ray Hartmann Changing the minds of Donald Trump’s supporters over his attempted insurrection will require a bombshell revelation of previously unreleased information because the nation is so divided in its media silos. That’s the view of Professor Brian Rosenwald, an expert on media and politics at the University of Pennsylvania. Rosenwald says he has personally found the House January 6 Committee hearings “powerful,” but he doubts that they have yet moved the needle politically. Still, Rosenwald doesn’t rule out that changing. And in an exclusive Raw Story interview, he added that Democrat…