Anderson Cooper 360

Attorneys: Whistleblower Tentatively Agrees To Testify, As Long As They Get Appropriate Clearances To Attend Hearing; Lawmakers Review Whistleblower Complaint As Rough WH Transcript Shows Pres. Trump Pushed Ukraine's President To Investigate Bidens; NY Times: Whistleblower Identified Multiple WH Officials As Witnesses To Potential Presidential Misconduct Who Could Corroborate Complaint; NY Times: Intelligence Community IG Found Reason To Believe The Whistleblower May Not Support Pres. Trump's Re-Election; Democratic Congressman After Seeing Whistleblower Complaint: "Deeply Disturbing" And "Alarming"; GOP Rep. Stefanik After Reading Complaint: Doesn't Support Impeachment; Senate Minority Leader Schumer After Reading Whistleblower Complaint: "I'm Even More Worried About What Happened"; GOP Sen. Sasse On Whistleblower Complaint: "A Lot That's Very Troubling"; Democratic House Intel Committee Chairman Schiff: Whistleblower Complaint Exposes "Se