I’m unaware of Presidents having that power.
If they do, they damn well shouldn’t.
Agreed. The government needs to get out of managing the economy, period. Freedom and capitalism works. Bureaucrats and politicians directing the economy with decrees from their ivory towers does not.
Theoretically, a President could direct his FTC or SEC to nix the deal. However, it might not withstand a court challenge (that few companies are willing to undertake). Don’t get me started on the EO-thing . . . .