Musk says he’ll award $1 million every day to Pennsylvania voters who sign his petition The HillExclusive: Trump ground game in key states flagged as potentially fake The Guardian USElon Musk Offers $1 Million Daily Prize for Signing His Petition The Wall Street JournalHow Elon Musk became Trump’s biggest supporter CNNElon Musk calls on Philadelphia to vote early for Trump. Some at the rally shouted back ‘Why?’ Fortune