"The Double" by Janice Law in Sherlock Holmes Mystery Magazine, Issue 7
Malik has the fortune, good or bad, of resembling the General, his country's beloved dictator. Naturally he is assigned the job of impersonating the General, saving him from boring meetings and assassingation attempts.
But the General is a far-thinker and he sends Malik, with proper supervision, to set up a new life for himself in Miami, just in case at some time in the future the General turns out not to be so beloved. And that works fine until the inevitable happens.
Because only one person can live that new life, right?