According to reports:

Did not know

Had suspicions

Knew

IRS logo

IRS Determinations Office

in Cincinnati

IRS logo

IRS Headquarters

in Washington

Congress logo

Congress

White House logo

White House

SOURCE: Treasury Inspector General for Tax Administration, House Ways and Means Committee, Senate Finance Committee, previous Post coverage including How the IRS seeded the clouds in 2010 for a political deluge three years later and The findings: A timeline.

Related stories