Bill Gates meets with Rep. Royce on Capitol Hill
© Lauren Schneiderman

SPOTTED: Bill Gates, donning black rimmed glasses and a yellow patterned tie, meeting with House Foreign Affairs Committee Chairman Ed RoyceEdward (Ed) Randall RoyceMystery surrounds elusive sanctions on Russia Hillicon Valley: Lawmakers struggle to understand Facebook's Libra project | EU hits Amazon with antitrust probe | New cybersecurity concerns over census | Robocall, election security bills head to House floor | Privacy questions over FaceApp House panel advances bill to protect elections from foreign interference MORE (R-Calif.) and other committee members Tuesday afternoon at the Rayburn House Office Building. 

The Microsoft co-founder has been staying busy during a whirlwind trip to Washington. On Monday, the billionaire philanthropist, who is a trustee and co-chairman of the Bill and Melinda Gates Foundation, visited the White House as President Obama spoke about World AIDS Day.

Gates also announced his foundation’s plans to almost double its contribution to the Global Fund to Fight AIDS, Tuberculosis and Malaria.