Political contribution

The money-laundering trial of Tom DeLay, former U.S. House majority leader, opened Monday with prosecutors accusing him of illegally channeling corporate money into Texas legislative races. Defense attorneys say no corporate money made its way to Texas candidates.

What companies have shelled out the most to America's political campaigns? Using data from the nonpartisan Center for Responsive Politics, we've created a top-10 list, offering a look at the candidates they support, the issues that concern them and their lobbying habits.

Political contributions from Wall Street are shifting from Democrats to Republicans, coinciding with financial reform legislation pushed through by President Obama in an attempt to protect Main Street from corporate greed.