Big websites like Facebook, Drudge Report, Breitbart News, Google and the New York Times would face substantial punishment if they don't make "reasonable efforts" to block foreigners from posting political ads under new election legislation pushed by Sen. John McCain and two Democrats.The "Honest Ads Act," co-sponsored by Democrats Virginia Sen. Mark Warner and Minnesota Sen. Amy Klobuchar, would put new legal requirements and punishments on websites with 50 million unique monthly readers that take a tiny $500 or more in political ads from one advertiser.The act, which already has a House companion bill, is aimed at forcing websites to...