Musk announced Saturday that every day until Election Day, he would give $1 million to a randomly selected voter who signs a petition circulated by his super PAC.

'Musk obviously has a right to be able to express his views. He's made it very, very clear that he supports Donald Trump. I don't. Obviously we have a difference of opinion,' Shapiro said, adding: 'I don't deny him that, right, but when you start flowing this kind of money into politics, I think it raises serious questions.'

Observers have suggested that such a stunt could potentially contravene laws that prohibit paying people to register to vote.

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