Trump says he doesn’t know who ‘partisan’ whistleblower is

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President Trump is claiming the whistleblower who filed an intelligence claim is part of a partisan political hack job, but refusing to say if he talked about Joe Biden or his family during a phone call that's now under intense scrutiny. Chris Jansing is joined by NBC’s Kelly O’Donnell, former Congressman David Jolly, NBC’s Ken Dilanian, and Washington Post Correspondent Anne Gearan to discuss what we know.