Turns out Nicolás Maduro's still the guy the world has to talk to in Venezuela. But recognizing Juan Guaidó as the country's legitimate president is still a useful tool. This week Colombia’s leftist President-elect Gustavo Petro said he recently discussed bilateral issues with Venezuelan President Nicolás Maduro — despite the fact that Colombia does not recognize Maduro as Venezuela’s legitimate head of state. But even top aides to President Biden are visiting Caracas lately to talk with top Maduro aides, even though the U.S. doesn't recognize Maduro, either. (On Thursday, the Biden Administration said it would make it easier for...