The four lawmakers, members of the anti-terror caucus, asked for an investigation into the Council on American Islamic Relations after discovering an internal memo noting the group's strategy. They also highlighted a new book by Paul Sperry titled "Muslim Mafia," scheduled for release on Thursday, which claims the group has been actively infiltrating Congress.

Reps. Sue Myrick of North Carolina, Trent Franks of Arizona, Paul Broun of Georgia and John Shadegg of Arizona asked the Internal Revenue Service to determine whether CAIR deserves its nonprofit status. They also are asking their colleagues to review a summary of findings that led the Justice Department to name CAIR as a ...