WASHINGTON, DC - AUGUST 31: The U.S. National Institutes of Allergy and Infectious Disease Director Dr. Anthony Fauci participates in a panel discussion on the Zika virus at the Georgetown University Law Center's O'Neill Institute for National and Global Health Law August 31, 2016 in Washington, DC. Centers for Disease Control and Prevention Director Dr. Thomas R. Frieden said that his agency has spent $194 million of the $222 million in federal funds set to fight the Zika virus and that if Congress did not budget more money to fight the disease. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - AUGUST 31: The U.S. National Institutes of Allergy and Infectious Disease Director Dr. Anthony Fauci gives a presentation about the Zika virus at the Georgetown University Law Center's O'Neill Institute for National and Global Health Law August 31, 2016 in Washington, DC. Centers for Disease Control and Prevention Director Dr. Thomas R. Frieden said that his agency has spent $194 million of the $222 million in federal funds set to fight the Zika virus and that if Congress did not budget more money to fight the disease. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - AUGUST 31: The U.S. National Institutes of Allergy and Infectious Disease Director Dr. Anthony Fauci gives a presentation about the Zika virus at the Georgetown University Law Center's O'Neill Institute for National and Global Health Law August 31, 2016 in Washington, DC. Centers for Disease Control and Prevention Director Dr. Thomas R. Frieden said that his agency has spent $194 million of the $222 million in federal funds set to fight the Zika virus and that if Congress did not budget more money to fight the disease. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - AUGUST 31: The U.S. National Institutes of Allergy and Infectious Disease Director Dr. Anthony Fauci participates in a panel discussion on the Zika virus at the Georgetown University Law Center's O'Neill Institute for National and Global Health Law August 31, 2016 in Washington, DC. Centers for Disease Control and Prevention Director Dr. Thomas R. Frieden said that his agency has spent $194 million of the $222 million in federal funds set to fight the Zika virus and that if Congress did not budget more money to fight the disease. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - AUGUST 31: The U.S. National Institutes of Allergy and Infectious Disease Director Dr. Anthony Fauci participates in a panel discussion on the Zika virus at the Georgetown University Law Center's O'Neill Institute for National and Global Health Law August 31, 2016 in Washington, DC. Centers for Disease Control and Prevention Director Dr. Thomas R. Frieden said that his agency has spent $194 million of the $222 million in federal funds set to fight the Zika virus and that if Congress did not budget more money to fight the disease. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - AUGUST 31: The U.S. National Institutes of Allergy and Infectious Disease Director Dr. Anthony Fauci gives a presentation about the Zika virus at the Georgetown University Law Center's O'Neill Institute for National and Global Health Law August 31, 2016 in Washington, DC. Centers for Disease Control and Prevention Director Dr. Thomas R. Frieden said that his agency has spent $194 million of the $222 million in federal funds set to fight the Zika virus and that if Congress did not budget more money to fight the disease. (Photo by Chip Somodevilla/Getty Images)

U.S. President Barack Obama waves to visitors as he departs the White House in Washington on his way to the Lake Tahoe Summit in Nevada August 31, 2016. REUTERS/Kevin Lamarque

WASHINGTON, DC - AUGUST 31: U.S. President Barack Obama departs the White House August 31, 2016 in Washington, DC. Obama is embarking on a nine day trip to Asia. (Photo by Win McNamee/Getty Images)