Heroes in Action have a line of Presidential Monster action figures, including JFK as the Phantom of the White House, Ronald Reagan as The Ronmy, GW Bush as Zombush, Bill Clinton as Wolf Bill, Richard Nixon as Monster from the Watergate Lagoon (my favorite of the bunch), Barack Obama as Baracula, and Abe Lincoln as Lincolnstein.
You can see the line-up here. Reason readers are invited to propose more presidential/monster mash-ups in the comment thread. William Howard Taft as Yog-Sothoth? LBJ as Leatherface? Maybe some sort of Killer Fordbot? America's toymakers await your instructions.