I’m amenable to the idea there is a core of campaign finance law that’s non-objectionable. But prosecuting a 501(c)(4) non-profit corporation for making a political movie about a candidate isn’t in the scope of that. That’s what the government chose to prosecute in that case. The “slippery slope” outcome—using a law ostensibly meant to keep Exxon from speaking to bludgeon a little non-profit—happened within a decade of the campaign finance law being enacted.
That is the reason why the courts have gotten so important, and why the Supreme Court and other federal justice nominations and their confirmation by the Trump administration will have such long lasting impact - given that there is no input from the legislative, governing has fallen to the executive and judiciary.
And of course the founding fathers didn't foresee today's' society, so they included ways to upgrade and amend the constitution and election laws.
That congress isn't doing its job is a different debate entirely, but not Scotus' fault.
> an abuse of its intended purpose in our system of checks and balances
The intention was to stop a dictator from rising, not that the country would be essentially governed by executive degree for a decade.
Kucho vs. Common Cause as well. Gerrymandering is a clear abuse of the system. Kagan’s dissent is heartbreaking.