It's not the first time that Nicolas Maduro has signaled a readiness to talk with Donald Trump about ending the escalating conflict in the Caribbean. The Venezuelan dictator may be worried that it will be the last time.Six weeks ago, Maduro claimed readiness to discuss the US-Venezuela conflict "face to face," hoping to stave off the effort to collapse his Chavista junta. Trump, who had suggested talks at the same time, had instead impressed upon Maduro the necessity of an exit. Trump then began ordering the seizure of tankers carrying Venezuelan oil under sanction, and then escalated again this week...