Truth in campaign advertising should be the law

[Commentary] Supreme Court rulings leave little room to regulate the influence of big money on political campaigns except in one very important area: disclosure. Corporations, unions and other organizations have unfettered rights to bankroll campaigns, but at least they can still be required to clearly disclose who's writing the checks. If we had to choose between trying to limit spending and requiring full, clear and immediate disclosure of who's bankrolling campaigns, we'd take disclosure in a heartbeat. People can make educated judgments about barrages of campaign claims when they understand who is behind them.