WASHINGTON, DC - JULY 06: U.S. Senate Majority Leader Sen. Mitch McConnell (R-KY) (3rd L) speaks as (L-R) Sen. Roger Wicker (R-MS), Sen. John Barrasso (R-WY), Sen. John Thune (R-SD) and Senate Majority Whip Sen. John Cornyn (R-TX) listen during a news briefing July 6, 2016 at the Capitol in Washington, DC. Senate GOPs held a weekly policy luncheon to discuss Republican agenda.Ê (Photo by Alex Wong/Getty Images)

WASHINGTON, DC - JULY 06: U.S. Senate Majority Leader Sen. Mitch McConnell (R-KY) (C) speaks as Sen. John Barrasso (R-WY) (L) and Senate Majority Whip Sen. John Cornyn (R-TX) (R) listen during a news briefing July 6, 2016 at the Capitol in Washington, DC. Senate GOPs held a weekly policy luncheon to discuss Republican agenda.Ê (Photo by Alex Wong/Getty Images)

WASHINGTON, DC - JULY 06: (L-R) U.S. Sen. John Barrasso (R-WY), Senate Majority Leader Sen. Mitch McConnell (R-KY), Sen. John Thune (R-SD) and Senate Majority Whip Sen. John Cornyn (R-TX) listen during a news briefing July 6, 2016 at the Capitol in Washington, DC. Senate GOPs held a weekly policy luncheon to discuss Republican agenda.Ê (Photo by Alex Wong/Getty Images)

WASHINGTON, DC - JULY 06: U.S. Senate Majority Leader Sen. Mitch McConnell (R-KY) (R) and Sen. John Thune (R-SD) (2nd R) come out for a news briefing after a weekly policy luncheon July 6, 2016 at the Capitol in Washington, DC. Senate GOPs held a weekly policy luncheon to discuss Republican agenda.Ê (Photo by Alex Wong/Getty Images)

WASHINGTON, DC - JULY 06: U.S. Senate Majority Whip Sen. John Cornyn (R-TX) speaks during a news briefing July 6, 2016 at the Capitol in Washington, DC. Senate GOPs held a weekly policy luncheon to discuss Republican agenda.Ê (Photo by Alex Wong/Getty Images)

WASHINGTON, DC - JULY 06: U.S. Sen. John Thune (R-SD) (3rd L) speaks as (L-R) Sen. Roger Wicker (R-MS), Sen. John Barrasso (R-WY), Senate Majority Whip Sen. John Cornyn (R-TX) and Senate Majority Leader Sen. Mitch McConnell (R-KY) listen during a news briefing July 6, 2016 at the Capitol in Washington, DC. Senate GOPs held a weekly policy luncheon to discuss Republican agenda.Ê (Photo by Alex Wong/Getty Images)

WASHINGTON, DC - JULY 06: Secretary of Defense Ashton Carter (R) listens as U.S. President Barack Obama delivers a statement from the Roosevelt Room at the White House on the deployment of U.S. troops in Afghanistan July 6, 2016 in Washington, DC. Obama said more U.S. troops will remain in Afghanistan than he originally planned, leaving 8,400 U.S. troops rather than the intended 5,000. (Photo by Win McNamee/Getty Images)

WASHINGTON, DC - JULY 06: U.S. Sen. Rand Paul (R-KY) (L) arrives at the Capitol July 6, 2016 in Washington, DC. Senate GOPs held a weekly policy luncheon to discuss Republican agenda.Ê (Photo by Alex Wong/Getty Images)