Donald Trump returned on Saturday to the Pennsylvania fairgrounds where he was nearly assassinated in July, holding a sprawling rally before a massive crowd in a critical swing state Trump hopes to return to his column in November’s election.The former president and Republican nominee picked up where he left off in July when a gunman tried to assassinate him and struck his ear. He began his speech with, “As I was saying,” and gestured toward an immigration chart he was looking at when the gunfire began.The Trump campaign worked to maximize the event’s headline-grabbing potential with just 30 days to go and voting already underway in some states in his race against his Democratic opponent, Vice President Kamala Harris. Musician Lee Greenwood appeared on stage and serenaded him with “God Bless the USA,” frequently played at his rallies, and billionaire Elon Musk spoke for the first time at a Trump …