The Only Realistic Way to Fix Campaign Finance

FOR the first time in modern history, the leading issue concerning voters in the upcoming presidential election, according to a recent Wall Street Journal/NBC News poll, is that “wealthy individuals and corporations will have too much influence over who wins.” Five years after the Supreme Court gave corporations and unions the right to spend unlimited amounts in political campaigns, voters have had enough.

Republican candidates, including Chris Christie, Ted Cruz and Lindsey Graham, and the main Democratic candidates, Hillary Rodham Clinton, Martin O’Malley and Bernie Sanders, all acknowledge the problem,...