A leading suspect in the Obama administration's use of intelligence reports to attack political opponents
...There is much more. The piece suggests that Powers was the likely source for several unmaskings that may have gone into the hundreds focused almost entirely on identifying people in the Trump campaign. As the UN Ambassador, she would normally not have been in the loop for such documents and the scandal may also implicate some people in the intel agencies that provided the material.
You can read the letter here, but Nunes isn’t leaving much to the imagination. He’s referring to one of only three individuals from the Obama administration who may have requested the unmasking of individual Americans in hundreds of cases and who “has no apparent intelligence-related function.”