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NATIONAL HARBOR, MD - FEBRUARY 24:  U.S. President Donald Trump addresses the Conservative Political Action Conference at the Gaylord National Resort and Convention Center February 24, 2017 in National Harbor, Maryland. Hosted by the American Conservative Union, CPAC is an annual gathering of right wing politicians, commentators and their supporters.  (Photo by Alex Wong/Getty Images)
NATIONAL HARBOR, MD - FEBRUARY 24:  U.S. President Donald Trump addresses the Conservative Political Action Conference at the Gaylord National Resort and Convention Center February 24, 2017 in National Harbor, Maryland. Hosted by the American Conservative Union, CPAC is an annual gathering of right wing politicians, commentators and their supporters.  (Photo by Alex Wong/Getty Images)

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    Former US official denies wiretapping Trump

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Former US official denies wiretapping Trump

A former senior US official with knowledge of investigations by the Justice Department under the Obama administration denies there was any wiretapping of President Trump's phones. CNN's Shimon Prokupecz reports.

Former US official denies wiretapping Trump

A former senior US official with knowledge of investigations by the Justice Department under the Obama administration denies there was any wiretapping of President Trump's phones. CNN's Shimon Prokupecz reports.