The House Intelligence Committee is looking for answers regarding the Obama administration’s spying on and unmasking of the names of Americans, including members of President Donald Trump’s transition team. On May 31, the committee issued three subpoenas seeking information on unmasking requests made by former national security adviser Susan Rice, former CIA Director John Brennan, and former U.N. Ambassador Samantha Power.

Samantha Power during a Foreign Affairs Committee hearing on Capitol Hill in Washington on June 16, 2015. Mark Wilson/Getty Images