A senior Democratic lawmaker with knowledge of some of the U.S. government’s most secretive operations has said he has “deep concerns” about certain activities by the Central Intelligence Agency.  The two-line letter written by Sen. Ron Wyden, the longest serving member of the Senate Intelligence Committee, does not disclose the nature of the CIA’s activities or the senator’s specific concerns. But the letter follows a pattern in recent years in which Wyden has publicly hinted at wrongdoing or