McCain Institute

In years past, the Clinton Foundation enjoyed significant donations from individuals and countries that sought to purchase influence in Washington. But now, the McCain Institute is their new darling, having received large sums from the likes of George Soros and Saudi Arabia.

U.S. Sen. John McCain, R-Ariz., greets Saudi Arabia’s King, Salman bin Abdul Aziz in Riyadh, Saudi Arabia. (AP/Carolyn Kaster)