The USA election system is a complicated mess. Its probably likely this is true, and also likely many countries, companies, important people, their cousins and friends, all tried their hand at tipping the scales. The problem with stuff like this is that it is literally not provable.

It is impossible to prove the majority of vote counts in the USA are accurate, at the state or federal primaries or elections. So the corollary is that it is impossible to prove any specific plot exists.

All of this could be stopped by implementing the same counting system(s) as exists in most countries elsewhere. Some states do this already, most do not.