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Republican presidential candidate Donald Trump speaks to a crowd of supporters during a campaign rally on June 18, 2016 in Phoenix, Arizona.
Republican presidential candidate Donald Trump speaks to a crowd of supporters during a campaign rally on June 18, 2016 in Phoenix, Arizona.

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    GOP Rep:concerns over Clinton, grave concerns over Trump

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GOP Rep:concerns over Clinton, grave concerns over Trump

Republican Rep. Adam Kinzinger explains why he's hesitant to back Trump and why it's Trump's responsibility to unite the party.

GOP Rep:concerns over Clinton, grave concerns over Trump

Republican Rep. Adam Kinzinger explains why he's hesitant to back Trump and why it's Trump's responsibility to unite the party.