Tracking Trump's visits to his properties and other conflicts of interest

In a recent Birmingham News op-ed, Sen. Richard Shelby (R-AL) promoted the Financial Regulatory Improvement Act of 2015, his effort to roll back the 2010 landmark Dodd-Frank financial reform law.

Earlier this month, a pro-ethanol nonprofit group, America’s Renewable Future, launched a campaign in Iowa attacking Sen. Ted Cruz’s position.

Last week, North Carolina mega-donor Art Pope announced his endorsement of Sen. Marco Rubio’s (R-FL) presidential campaign.

According to USA Today, a Turkish religious movement may have donated hundreds of thousands of dollars to congressional and presidential candidates during the past several years.

Significant amounts of the NRA’s spending remain shrouded in secrecy – its non-profit arm that does not disclose its donors spent at least $12 million on federal elections alone in 2014.