The Senate Homeland Security and Government Affairs Committee approved on Wednesday its first subpoena as part of an investigation into the relationship between former Vice President Joe Biden and the Ukrainian energy company Burisma Holdings.
Senate Committee Issues First Subpoena in Biden-Burisma Investigation

Sen. Ron Johnson (R-Wis.) in Washington on June 7, 2016. Win McNamee/Getty Images

Allen Zhong
senior writer
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