MOON TOWNSHIP, Pa. (WPXI) — President Donald Trump made a campaign stop in the Pittsburgh area Tuesday, his fourth trip to Pennsylvania in the month of September. Trump’s Great American Comeback event took place at Atlantic Aviation, a private business near Pittsburgh International Airport in Moon Township. The entire area was packed as Trump touched on fracking, job creation, COVID-19 and condemned aggressive protesters. Not many people were observing social distancing, but a good number were wearing masks at the event. Earlier in the day, Gov. Tom Wolf said that the state had sent a letter to the White House about limiting the crowd for the event to only 250 people. Wolf said he received no response. Biden has made four visits to Pennsylvania this month, including one last week during which he focused on “Made in America,” highlighting the value of manufacturing jobs.