Top fundraisers for the presidential campaigns of Democrat Hillary Clinton and Republican John McCain lobby on behalf of foreign governments, and in some cases, helped their clients gain access to the senators, according to a CIR and ABCNews.com investigation.

>> Read the story on ABCNews.com.

>> View CIR’s chart “Web of Influence” and source documents.

Will Evans is a senior reporter and producer for Reveal, covering labor and tech. His reporting has prompted government investigations, legislation, reforms and prosecutions. A series on working conditions at Amazon warehouses was a finalist for a Pulitzer Prize and won a Gerald Loeb Award. His work has also won multiple Investigative Reporters and Editors Awards, including for a series on safety problems at Tesla. Other investigations have exposed secret spying at Uber, illegal discrimination in the temp industry and rampant fraud in California's drug rehab system for the poor. Prior to joining The Center for Investigative Reporting in 2005, Evans was a reporter at The Sacramento Bee. He is based in Reveal's Emeryville, California, office.