WASHINGTON, DC - SEPTEMBER 07: (L-R) Sen. John Thune (R-SD), Sen. John Barrosso (R-WY), Senate Majority Whip John Cornyn (R-TX) and Senate Majority Leader Mitch McConnell (R-KY) hold a news conference following the weekly Senate Democratic policy luncheon at the U.S. Capitol September 7, 2016 in Washington, DC. The GOP senators answered reporters' questions following their first policy meeting since the end of a seven-week break. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 07: Easter Seals Vice President for Government Relations Katy Neas joins 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) 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: Executive Director for the National Association of County and City Health Officials Dr. LaMar Hasbrouck joins 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: 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)

WASHINGTON, DC - SEPTEMBER 07: Rep. Rosa DeLauro (D-CT) 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: (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)