WASHINGTON, DC - SEPTEMBER 07: (L-R) Rep. Frederica Wilson (D-FL), Democratic National Committee Chair Rep. Debbie Wasserman Schultz (D-FL), House Minority Leader Nancy Pelosi (D-CA) and Rep. Rosa DeLauro (D-CT) hold a news conference to call on Republicans to fund programs to combat the spread of the Zika virus at the U.S. Capitol September 7, 2016 in Washington, DC. Congress returned yesterday from a seven-week break during which time the Florida Department of Health confirmed the first local cases of Zika on July 29. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 07: House Minority Leader Nancy Pelosi (D-CA), Rep. Nita Lowey (D-NY) and fellow Democratic members of the House hold a news conference to call on Republicans to fund programs to combat the spread of the Zika virus at the U.S. Capitol September 7, 2016 in Washington, DC. Congress returned yesterday from a seven-week break during which time the Florida Department of Health confirmed the first local cases of Zika on July 29. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 07: Democratic National Committee Chair Rep. Debbie Wasserman Schultz (D-FL) (L) and Rep. Rosa DeLauro (D-CT) join fellow Democratic members of the House for a news conference to call on Republicans to fund programs to combat the spread of the Zika virus at the U.S. Capitol September 7, 2016 in Washington, DC. Congress returned yesterday from a seven-week break during which time the Florida Department of Health confirmed the first local cases of Zika on July 29. (Photo by Chip Somodevilla/Getty Images)

Jeffrey Lacker (C), president of the Federal Reserve Bank of Richmond, participates in a session titled, "Help or Harm: Central Bank Monetary Policies at the Outer Limits" NABE Economic Policy Conference in Washington March 5, 2013. REUTERS/Yuri Gripas

WASHINGTON, DC - SEPTEMBER 07: Emily Holubowich and her 6-month-old daughter Jackie join House Minority Leader Nancy Pelosi (D-CA) and fellow Democratic members of the House during a news conference to call on Republicans to fund programs to combat the spread of the Zika virus at the U.S. Capitol September 7, 2016 in Washington, DC. Congress returned yesterday from a seven-week break during which time the Florida Department of Health confirmed the first local cases of Zika on July 29. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 07: Emily Holubowich and her 6-month-old daughter Jackie join American Public Health Association Executive Director George Benjamin Democratic and Democratic members of the House of Representatives for a news conference to call on Republicans to fund programs to combat the spread of the Zika virus at the U.S. Capitol September 7, 2016 in Washington, DC. Congress returned yesterday from a seven-week break during which time the Florida Department of Health confirmed the first local cases of Zika on July 29. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 07: Emily Holubowich and her 6-month-old daughter Jackie join House Minority Leader Nancy Pelosi (D-CA) and fellow Democratic members of the House during a news conference to call on Republicans to fund programs to combat the spread of the Zika virus at the U.S. Capitol September 7, 2016 in Washington, DC. Congress returned yesterday from a seven-week break during which time the Florida Department of Health confirmed the first local cases of Zika on July 29. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 07: House Minority Leader Nancy Pelosi (D-CA) arrives for a news conference to call on Republicans to fund programs to combat the spread of the Zika virus at the U.S. Capitol September 7, 2016 in Washington, DC. Congress returned yesterday from a seven-week break during which time the Florida Department of Health confirmed the first local cases of Zika on July 29. (Photo by Chip Somodevilla/Getty Images)