The Washington Post reports: The Pentagon’s top watchdog has launched an investigation into money that former national security adviser and retired Army Lt. Gen. Michael Flynn received from foreign groups and whether he failed to obtain proper approval to do so, lawmakers and defense officials said Thursday.

The Pentagon has in the past advised retiring officers that because they can be recalled to military service, they are subject to the Constitution’s rarely enforced emoluments clause, which prohibits top officials from receiving payments or favors from foreign governments.

On Thursday, Rep. Elijah E. Cummings (Md.), the top Democrat on the Oversight Committee, released an Oct. 8, 2014, letter in which a Defense Department lawyer warned Flynn upon his retirement from military service that he was forbidden from receiving payments from foreign sources without receiving permission from the U.S. government first.

Flynn received $45,000 to appear in 2015 with Russian President Vladimir Putin at a gala dinner for RT, a Kremlin-controlled media organization. He also worked as a foreign agent representing Turkish interests for a Netherlands-based company, Inovo BV, which paid his company $530,000 in the fall. [Continue reading…]