Citizens United v. Federal Election Commission in 2010 tossed aside decades of legislative restrictions, freeing corporations and unions to spend as much as they wished. Six months ago, the Supreme Court took its Citizens United decision further. In McCutcheon v. Federal Election Commission, it struck down long standing caps on what an individual may contribute to all federal candidates, collectively, in any two-year election cycle. With conservative justices dominant, the court expanded the concept that money is equivalent to speech, protected by the First Amendment. Corporations, it said, enjoy the same political rights as individuals. A study by the Sunlight Foundation, an advocate for government transparency, found that 31,385 people - that is 1 percent of 1 percent of the United States population - accounted for 28 percent of all disclosed contributions in the 2012 elections. This year, an analysis by The New York Times shows, more than half of broadcast advertising in the midterm elections has been paid for by groups that reveal little or nothing about their donors. Overwhelmingly, the main beneficiaries have been conservative organizations.