Gov. Walker: Romney tax returns don't matter

Gov. Walker: Romney tax returns don't matter

Gov. Walker: Romney tax returns don't matter

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Gov. Walker: Romney tax returns don't matter

Gov. Walker: Romney tax returns don't matter
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Dr. Ben Carson calls Donald Trump and Hillary Clinton 'elderly,' urges them to release medical history

Dr. Ben Carson calls Donald Trump and Hillary Clinton 'elderly,' urges them to release medical history Up next

Dr. Ben Carson calls Donald Trump and Hillary Clinton 'elderly,' urges them to release medical history