Donald Trump

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Republican presidential candidate Donald Trump pauses while speaking at a campaign town hall at Ocean Center, Wednesday, Aug. 3, 2016, in Daytona Beach, Fla. (AP Photo/Evan Vucci)

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Republican presidential candidate Donald Trump speaks during a campaign rally at Briar Woods High School, Tuesday, Aug. 2, 2016, in Ashburn, Va. (AP Photo/Evan Vucci)

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Republican presidential candidate Donald Trump speaks during a campaign rally at Briar Woods High School, Tuesday, Aug. 2, 2016, in Ashburn, Va. (AP Photo/Evan Vucci)

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Republican presidential candidate Donald Trump speaks during a campaign rally at Briar Woods High School, Tuesday, Aug. 2, 2016, in Ashburn, Va. (AP Photo/Evan Vucci)

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Republican presidential candidate Donald Trump speaks during a campaign rally at Briar Woods High School, Tuesday, Aug. 2, 2016, in Ashburn, Va. (AP Photo/Evan Vucci)

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Republican presidential candidate Donald Trump holds a Purple Heart medal given to him by a supporter during a campaign rally at Briar Woods High School, Tuesday, Aug. 2, 2016, in Ashburn, Va. (AP Photo/Evan Vucci)

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Republican presidential candidate Donald Trump speaks during a campaign rally at Briar Woods High School, Tuesday, Aug. 2, 2016, in Ashburn, Va. (AP Photo/Evan Vucci)

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Republican presidential candidate Donald Trump speaks during a campaign rally at Briar Woods High School, Tuesday, Aug. 2, 2016, in Ashburn, Va. (AP Photo/Evan Vucci)

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Republican presidential candidate Donald Trump shakes hands during a campaign rally at Cumberland Valley High School, Monday, Aug. 1, 2016, in Mechanicsburg, Pa. (AP Photo/Evan Vucci)

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Republican presidential candidate Donald Trump speaks during a campaign rally at Cumberland Valley High School, Monday, Aug. 1, 2016, in Mechanicsburg, Pa. (AP Photo/Evan Vucci)

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Donald Trump said that he wouldn't be a pushover as U.S. president in dealing with the Russian president Vladimir Putin.

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Republican presidential candidate Donald Trump gives a thumbs up as he speaks during a campaign rally, Friday, July 29, 2016, in Colorado Springs, Colo. (AP Photo/Evan Vucci)

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Republican presidential candidate Donald Trump speaks during a campaign rally, Friday, July 29, 2016, in Colorado Springs, Colo. (AP Photo/Evan Vucci)

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In this Sunday, Feb. 7, 2016, file photo, a woman wears a shirt reading 'Trump Putin '16' while waiting for Republican presidential candidate Donald Trump to speak at a campaign event at Plymouth State University in Plymouth, N.H. (AP Photo/David Goldman, File)