Elon Musk is campaigning for Donald Trump in Pennsylvania.Ryan Collerd/AFP via Getty ImagesElon Musk's private planes made eight flights to Pennsylvania this past week, flight logs show.Musk has been actively endorsing Donald Trump, holding rallies in key Pennsylvania cities.Some Tesla employees tell BI they aren't happy about Musk's campaigning. Others are indifferent.Flight logs viewed by Business Insider show how the world's richest man is going all-in to elect former president Donald Trump.Elon Musk's private planes took eight flights to and from Pennsylvania over the past week as the billionaire rallied voters.Earlier this month, The New York Times reported that Musk was considering door-knocking in battleground states like Pennsylvania.