Billionaire Donald Trump supporter Elon Musk is putting up $1 million every day up to the US presidential elections on November 5 as a bonus to the signatories of a petition encouraging people to vote in key swing states. The petition supports “free speech and the right to bear arms” and pledges that every day from Saturday every person who signs the petition will be selected to have a chance of earning the prize. Speaking at a rally in Harrisburg in Pennsylvania, Musk said his aim was to get between 1 million and 2 million voters in swing states to sign “because I think this sends a crucial m…