President Donald Trump’s Transportation Secretary Sean Duffy prompted a swift backlash after scolding a child for “yawning” at what critics call a boring event that would have put even grown adults to sleep, let alone children. Duffy was in Philadelphia Thursday, May 7, as part of the Trump administration’s yearlong celebration honoring America’s 250th birthday after riding Amtrak’s new “Freedom 250” Acela train from Washington to Philly’s 30th …