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. Follow Kyra on Twitter @kyraphillips Follow Chris on Twitter @vlasto Follow Matt on Twitter @mattmosk Follow John on Twitter @santucci Support this podcast with a review on Apple Podcasts: http://bit.ly/2UJIsJs Recommended listening... -- Start Here: The daily 20-minute news podcast from ABC News. http://bit.ly/2SA62eg -- Powerhouse Politics: Headliner interviews and in-depth looks at the people and events shaping U.S. politics. http://bit.ly/2SsGwr7 -- FiveThirtyEight Politics: Nate Silver and the FiveThirtyEight team cover the latest in politics, tracking the issues and "game-changers" every week. https://53eig.ht/2RF3eb1 ==================== The Investigation is produced by ABC Radio. Learn more about your ad choices. Visit megaphone.fm/adchoices