In this episode of The Investigation, the team analyzes the congressional call for President Trump's tax returns. Robert Driscoll, attorney for former White House personnel security director Carl Kline, joins to discuss a whistleblower's allegations that some security clearance applications granted were not in the best interest of national security, the House Oversight Committee's investigation into the review process, and why he believes the motivation behind their probe is actually digging up "opposition research" on the first family. Additionally, ABC's Chief Justice Correspondent Pierre Thomas weighs in to forecast the pending release of the redacted Mueller report.

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The Investigation is produced by ABC Radio.

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