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Assistant and White House chief strategist to US President Donald Trump, Steve Bannon listens as Trump delivers remarks with auto industry executives at American Center for Mobility in Ypsilanti, Michigan on March 15, 2017. / AFP PHOTO / Nicholas Kamm        (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)
Assistant and White House chief strategist to US President Donald Trump, Steve Bannon listens as Trump delivers remarks with auto industry executives at American Center for Mobility in Ypsilanti, Michigan on March 15, 2017. / AFP PHOTO / Nicholas Kamm        (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)

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    Bannon plans primaries for GOP incumbents

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Bannon plans primaries for GOP incumbents

Steve Bannon, President Trump's former chief strategist, is preparing primary challenges against Republican senators, a source close to Bannon confirmed to CNN.

Bannon plans primaries for GOP incumbents

Steve Bannon, President Trump's former chief strategist, is preparing primary challenges against Republican senators, a source close to Bannon confirmed to CNN.