Legal experts say Trump could invoke a doctrine called executive privilege to try and stop Comey from testifying. The following describes how executive privilege works and why it could backfire on Trump. How would Trump invoke the privilege to block Comey's testimony? Executive privilege cannot be used to "cover up government misconduct," said Andrew Wright, a professor at Savannah Law School. It would be procedurally complicated to challenge a decision by Trump to block Comey's testimony.

Source: CBC News June 02, 2017 23:26 UTC