From the GOP handbook of Maryland politics:

(1) Recruit homeless men in Philadelphia;
(2) Bus them into Maryland;
(3) Arrange for the Republican governor's wife to greet them upon their arrival;
(4) Outfit them in hats and T-shirts for the governor's re-election campaign;
(5) Have them pass out flyers in heavily Democratic areas that erroneously identify the GOP candidates for governor and U.S. senator as "Democrats."

The complete primer here.

Update: A first-hand account here.