Why has Reform been Difficult to Achieve when it comes to Campaign Finance?

-Lack of Political Will: Politicians are hesitant to Tighten Rules that Regulate the Money they get, as they have benefitted from the Money! -SCOTUS Response: The 1st Amendment usually makes Reform an Absolute Nightmare -Loopholes: Wealthy Businesses have Resources to Find and Exploit Loopholes like Soft Money which are Hard to Close -Entrenched Constitution: The only way to Overturn SCOTUS rulings is to Amend the Constitution. Sanders tried, and Failed to get his 'Saving American Democracy' Amendment through Congress