WASHINGTON (CNN) – Add another name to the list of political observers who think a Clinton-Obama ticket would be unbeatable: Cuban leader Fidel Castro.

In an editorial in Cuba's communist party newspaper, Granma, the ailing dictator said the pairing of the two White House hopefuls seemed "invincible," according to an English translation on the paper's Web site.

"Both of them feel the sacred duty of demanding 'a democratic government in Cuba,'" Castro wrote. "They are not making politics: they are playing a game of cards on a Sunday afternoon."

The two Democratic candidates actually disagree over America's policy toward Cuba. Obama, a senator from Illinois, wants to grant Cuban-Americans "unrestricted rights to visit family and send remittances to the island." Such activities are strictly limited by current U.S. policy.