If we remember the 2016 Republican primary, there were at least a dozen viable candidates vying for the nomination under party chair Reince Priebus. Numerous moderate Republicans split their constituency and consequently Trump won the nomination. If there had been, say, approval voting instead of plurality voting, Trump would have been defeated in that primary.
So the rise of Superpacs and their money helped create the beachead for Trump to eventually take over the Repub Party.
If we remember the 2016 Republican primary, there were at least a dozen viable candidates vying for the nomination under party chair Reince Priebus. Numerous moderate Republicans split their constituency and consequently Trump won the nomination. If there had been, say, approval voting instead of plurality voting, Trump would have been defeated in that primary.