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How John Roberts might oversee a Senate impeachment trial

Washington (CNN)As the Democratic-led US House moves toward an impeachment vote on President Donald Trump, attention is turning to the likely Senate trial and how forcefully Chief Justice John Roberts might operate as he presides over the chamber. Senators are quarreling over whether to call witnesses and which ones. Schumer has told Majority Leader Mitch McConnell that he wants at least four witnesses to testify, including Bolton and acting White House chief of staff Mick Mulvaney. Republican senators have suggested, alternatively, that they may want to call Hunter Biden, son…

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