WASHINGTON, DC - SEPTEMBER 13: U.S. Republican vice presidental nominee Gov. Mike Pence (C) answers reporters' questions during a news conference with Speaker of the House Paul Ryan (R-WI) (R) and Rep. Cathy McMorris Rodgers (R-WA) (L) 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)

WASHINGTON, DC - SEPTEMBER 13: U.S. Republican vice presidental nominee Gov. Mike Pence (C) answers reporters' questions during a news conference with Speaker of the House Paul Ryan (R-WI) (R) and Rep. Cathy McMorris Rodgers (R-WA) (L) 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)

WASHINGTON, DC - SEPTEMBER 13: U.S. Republican vice presidental nominee Gov. Mike Pence speaks at a news conference with Speaker of the House Paul Ryan (R-WI) (L) 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)

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 candidate Gov. Mike Pence (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: (L-R) U.S. Republican vice presidental candidate Gov. Mike Pence joins House Majority Leader Kevin McCarthy (R-CA), Speaker of the House Paul Ryan (R-WI) and House Majority Whip Steve Scalise (R-LA) 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: (L-R) Rep. Cathy McMorris Rodgers (R-WA), Speaker of the House Paul Ryan (R-WI), U.S. Republican vice presidental nominee Gov. Mike Pence, House Majority Leader Kevin McCarthy (R-CA), 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)

A protester hands out "Trump Ducks" as she protests Republican presidential nominee Donald Trump's lack of tax returns released to the public outside the Republican National Committee headquarters in Washington, DC, September 13, 2016. / AFP PHOTO / JIM WATSONJIM WATSON/AFP/Getty Images

A protester dress like Donald Duck hands out "Trump Ducks" while protesting Republican presidential nominee Donald Trump's lack of tax returns released to the public outside the Republican National Committee headquarters in Washington, DC, September 13, 2016. / AFP PHOTO / JIM WATSONJIM WATSON/AFP/Getty Images