IRS

When U.S. tax agents started singling out non-profit groups for extra scrutiny in 2010, they looked at first only for key words such as 'Tea Party,' but later they focused on criticisms by groups of "how the country is being run," according to investigative findings reviewed by Reuters on Sunday.

Over two years, IRS field office agents repeatedly changed their criteria while sifting through thousands of applications from groups seeking tax-exempt status to select ones for possible closer examination, the findings showed.