The Kremlin-9 Fund, on the other hand, officially supports the Federal Protective Service (the Russian analogue of the Secret Service).

NEWYORKER: Net Impact

Sources familiar with the position of the Secret Service in the dispute tell CNN that Director Lewis Merletti told Starr and other independent counsel staffers, in a February briefing, that should his agents be denied the privilege, "we will lose a president of the United States to assassination" and that trust and confidence between the protective service and its protectees will be lost.

CNN: Quayle: Secret Service Should Testify

Of all occupations, protective-service occupations suffered the greatest relative increase in workplace fatalities in 2007, jumping 20% to 314.

FORBES: America's Most Dangerous Jobs