CLEVELAND, OH - JULY 20: Donald Trump and his family attend a welcome arrival event with Governor Mike Pence and his family at the Great Lakes Science Centre on July 20, 2016 in Cleveland Ohio. Republican presidential candidate Donald Trump received the number of votes needed to secure the party's nomination. An estimated 50,000 people are expected in Cleveland, including hundreds of protesters and members of the media. The four-day Republican National Convention kicked off on July 18. (Photo by Jeff J Mitchell/Getty Images)

CLEVELAND, OH - JULY 20: Donald Trump and his family attend a welcome arrival event with Governor Mike Pence and his family at the Great Lakes Science Centre on July 20, 2016 in Cleveland Ohio. Republican presidential candidate Donald Trump received the number of votes needed to secure the party's nomination. An estimated 50,000 people are expected in Cleveland, including hundreds of protesters and members of the media. The four-day Republican National Convention kicked off on July 18. (Photo by Jeff J Mitchell/Getty Images)

CLEVELAND, OH - JULY 20: Donald Trump and his family attend a welcome arrival event with Governor Mike Pence and his family at the Great Lakes Science Centre on July 20, 2016 in Cleveland Ohio. Republican presidential candidate Donald Trump received the number of votes needed to secure the party's nomination. An estimated 50,000 people are expected in Cleveland, including hundreds of protesters and members of the media. The four-day Republican National Convention kicked off on July 18. (Photo by Jeff J Mitchell/Getty Images)

CLEVELAND, OH - JULY 20: Donald Trump and his family attend a welcome arrival event with Governor Mike Pence and his family at the Great Lakes Science Centre on July 20, 2016 in Cleveland Ohio. Republican presidential candidate Donald Trump received the number of votes needed to secure the party's nomination. An estimated 50,000 people are expected in Cleveland, including hundreds of protesters and members of the media. The four-day Republican National Convention kicked off on July 18. (Photo by Jeff J Mitchell/Getty Images)

CLEVELAND, OH - JULY 20: Donald Trump and his family attend a welcome arrival event with Governor Mike Pence and his family at the Great Lakes Science Centre on July 20, 2016 in Cleveland Ohio. Republican presidential candidate Donald Trump received the number of votes needed to secure the party's nomination. An estimated 50,000 people are expected in Cleveland, including hundreds of protesters and members of the media. The four-day Republican National Convention kicked off on July 18. (Photo by Jeff J Mitchell/Getty Images)

CLEVELAND, OH - JULY 20: Donald Trump and his family attend a welcome arrival event with Governor Mike Pence and his family at the Great Lakes Science Centre on July 20, 2016 in Cleveland Ohio. Republican presidential candidate Donald Trump received the number of votes needed to secure the party's nomination. An estimated 50,000 people are expected in Cleveland, including hundreds of protesters and members of the media. The four-day Republican National Convention kicked off on July 18. (Photo by Jeff J Mitchell/Getty Images)

CLEVELAND, OH - JULY 20: A helicopter carrying republican presidential nominee Donald Trump lands at the Great Lakes Science Center on July 20, 2016 in Cleveland, Ohio. Republican presidential nominee Donald Trump gathered with running mate Mike Pence and their families at the Great Lakes Science Center on day three of the Republican National Convention. (Photo by Justin Sullivan/Getty Images)

CLEVELAND, OH - JULY 20: A helicopter carrying republican presidential nominee Donald Trump flies over FirstEnergy Stadium on July 20, 2016 in Cleveland, Ohio. Republican presidential nominee Donald Trump gathered with running mate Mike Pence and their families at the Great Lakes Science Center on day three of the Republican National Convention. (Photo by Justin Sullivan/Getty Images)