WASHINGTON, DC - SEPTEMBER 13: U.S. Republican vice presidental nominee Gov. Mike Pence (L) answers reporters' questions during a news conference with Speaker of the House Paul Ryan (R-WI) and other House GOP leaders following a conference at the Republican headquaters on Capitol Hill September 13, 2016 in Washington, DC. When asked about former vice presidential candidate Ryan's reluctance to endorse presidential candidate Donald Trump, Pence said that the House Republicans and the campaign agree on a plan for America. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 13: U.S. Republican vice presidental nominee Gov. Mike Pence address a news conference with House GOP leaders following a conference at Republican headquaters on Capitol Hill September 13, 2016 in Washington, DC. When asked about former vice presidential candidate Speaker Paul Ryan's reluctance to endorse presidential candidate Donald Trump, Pence said that the House Republicans and the campaign agree on a plan for America. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 13: (L-R) Rep. Cathy McMorris Rodgers (R-WA), U.S. Republican vice presidental nominee Gov. Mike Pence, House Majority Leader Kevin McCarthy (R-CA), Speaker of the House Paul Ryan (R-WI) and House Majority Whip Steve Scalise (R-LA) hold a news conference following a weekly policy meeting at the Republican headquaters on Capitol Hill September 13, 2016 in Washington, DC. When asked about former vice presidential candidate Ryan's reluctance to endorse Donald Trump, Pence said that the House Republicans and the campaign agree on a plan for America. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 13: U.S. Republican vice presidental nominee Gov. Mike Pence addresses a news conference with House GOP leaders following a conference at Republican headquaters on Capitol Hill September 13, 2016 in Washington, DC. When asked about former vice presidential candidate Speaker Paul Ryan's reluctance to endorse presidential candidate Donald Trump, Pence said that the House Republicans and the campaign agree on a plan for America. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 13: U.S. Republican vice presidental nominee Gov. Mike Pence (C) answers reporters' questions during a news conference with Rep. Cathy McMorris Rodgers (R-WA) and other House GOP leaders following a conference at the Republican headquaters on Capitol Hill September 13, 2016 in Washington, DC. When asked about former vice presidential candidate Ryan's reluctance to endorse presidential candidate Donald Trump, Pence said that the House Republicans and the campaign agree on a plan for America. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 13: Speaker of the House Paul Ryan (R-WI) (C) reacts to being asked about his previous reluctance to support Donald Trump during a news conference with U.S. Republican vice presidental nominee Gov. Mike Pence (2nd L) and other House GOP leaders following a weekly policy meeting at the Republican headquaters on Capitol Hill September 13, 2016 in Washington, DC. When asked about former vice presidential candidate Ryan's reluctance to endorse Republican presidential candidate, Pence said that the House Republicans and the campaign agree on a plan for America. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 13: U.S. Republican vice presidental nominee Gov. Mike Pence (L) joins Speaker of the House Paul Ryan (R-WI), House Majority Whip Steve Scalise (R-LA) (R) and other members of the House GOP leadership for a news conference following a weekly policy meeting at the Republican headquaters on Capitol Hill September 13, 2016 in Washington, DC. When asked about former vice presidential candidate Ryan's reluctance to endorse Donald Trump, Pence said that the House Republicans and the campaign agree on a plan for America. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 13: Speaker of the House Paul Ryan (R-WI) (L) listens to U.S. Republican vice presidental nominee Gov. Mike Pence during a news conference following a weekly House GOP conference at the Republican headquaters on Capitol Hill September 13, 2016 in Washington, DC. When asked about former vice presidential candidate Ryan's reluctance to endorse presidential candidate Donald Trump, Pence said that the House Republicans and the campaign agree on a plan for America. (Photo by Chip Somodevilla/Getty Images)