Venezuelan President Nicolás Maduro dancing the salsa, an ability his supporters cite as evidence of… CARACAS, Venezuela—Call it Venezuela’s own birther movement. Desperate to end 18 years of Socialist rule, Venezuela’s opposition movement is trying to undermine embattled President Nicolás Maduro by claiming he has Colombian citizenship. The opposition has tried everything to wrest power, from a coup attempt in 2002 to its effort this year to stage a recall referendum on Mr. Maduro. Some lawmakers in the opposition-controlled Congress are playing one last card: trying to prove that Mr. Maduro was either born in Colombia or never renounced the Colombian nationality that by law is automatically granted to him because his mother, Teresa de Jesús Moros, was born there, in the border city of Cúcuta. “Venezuelans are clamoring for the president to show us his birth certificate,” said Dennis Fernández, an opposition congresswoman who since February has led […]