Originally Posted by patteeu
For me, control would mean the billionaire could force the party to do whatever he wants. Influence would mean the he could increase the odds that the party would do what he wants. It might be strong influence (which approaches control) or weak influence (far from control) or anything in between.
So in your take, having "control" over a political party in a democratic country like the US would be impossible, unless that party abandoned even the slightest democratic procedure.