While Elizabeth Warren hits a polling high, but shes still facing a major challenge. Well take a look at that in a moment. We start this hour with the new battle lines in the constitutional clash between the white house and congress. The Trump Administration now publicly refusing to cooperate with the impeachment inquiry. Right now were in a standoff waiting to see who blinks first. Nbc White House Correspondent Kelly Odonnell is on the north lawn for us. Garrett haake is stationed on capitol hill. Mr. Haake, ill start with you. House Speaker Nancy Pelosi is vowing that democrats will move forward with this impeachment inquiry. How do they go about doing that without cooperation from this white house . Reporter craig, theyll do that on a couple of tracks. First, youll see an increased emphasis on getting the whistleblower and anyone who might be able to kwob rate his or her accounts in front of the committees doing the investigating here they know now they cant rely on the white house