But pro-disclosure groups are pushing to change that.

Paul Manafort's failure to disclose foreign ties underscores need for lobbying reform.

The conservative columnist is so outraged at plutocrats facing criticism that he's reversed his position on disclosure.

The Internal Revenue Service, the Federal Elections Commission and Congress have all played a role in the emergence of undisclosed contributions in the 2012 elections.

After a Supreme Court setback, Citizens United opponents are still working to put voters "back in the driver's seat" of democracy.