Union electrical workers at a Philadelphia job site hung a huge barrier welcoming President Donald Trump to the city, highlighting his high support among rank and file members of skilled unions. The union members of the International Brotherhood of Electrical Workers unfurled their banner, which said “Buy American” and “Welcome to Philly Mr. President.” Fox News contributor and pollster Frank Luntz caught the Thursday display and tweeted about it. The @IBEW Local Union #98 welcomes President Trump. Big banner in full view of #GOPRetreat. pic.twitter.com/rj77lrRkrW — Frank Luntz (@FrankLuntz) January 26, 2017 During the election, support for Trump rose among...