Dark Money
Ben Carson and Hillary Clinton led their parties' primary fields in fundraising in the latest period.
The oil billionaire says he's disclosed all of his political contributions.
Corporations are increasingly disclosing their contributions to dark money nonprofits and corporate lobbying groups.
Donors to pro-Jindal outside groups included appointees, companies employing lobbyists and recipients of state subsidies.
WHAT'S HAPPENING
Most early money comes from groups that don't disclose their donors.
Who's behind these groups, anyway?
Three wealthy investors appear to be behind two conservative dark money groups.