On June 2, 2010, Hillary Clinton's calendar as secretary of state shows that she held a half-hour meeting with billionaire investor George Soros and officials from his Open Society Institute, which makes grants to various causes around the world. (The group is now known as the Open Society Foundations.)
In the room for the meeting was Obama White House special assistant Michael McFaul, who would go on to become the U.S. ambassador to Russia. Also included, according to the calendar entry, were two officials from the Open Society Institute: Michael Hall, who is now the group's regional director for the Caucasus and Central Asia, and Jeff Goldstein, who is now the group's senior policy advisor for Eurasia, according to the organization's website.
Here's the calendar listing for the meeting: