Trump's ex-campaign manager stonewalls, clashes with Democrats in impeachment hearing; Lewandowski confirms Trump asked him to help limit Mueller investigation; Lewandowski: I have no obligation to be honest with the media

Nadler rebukes Lewandowski, warns of holding him in contempt; Trump praises ex-campaign manager as Lewandowski stonewalls Democrats on orders from the White House; Trump's EPA set to revoke California's authority to set vehicle standards; CNN source: "very high probability" attacks on Saudi oil sites launched from Iranian base; Pompeo heading to Saudi Arabia over Iran tensions; New post-debate poll: Biden leads Democrats with 31%, Warren rises to 25%, Sanders third with 14%; Threat of deadly flooding as Tropical Storm Imelda hits Texas; Veteran journalist Cokie Roberts dead at age 75

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