Arriving at Talks, Venezuelan Opposition Leader Is Rebuffed and Rerouted

Not long ago, Juan Guaidó was leading protests in Caracas, the Venezuelan capital, and being feted at the White House, with dozens of nations backing his claim to be the nation’s rightful leader.

But in a sign of how much his position has changed, Mr. Guaidó could not muster even an invitation to talks about his country’s future in Bogotá, Colombia, on Tuesday, and when he tried to attend the meeting anyway, he was quickly shuffled onto a flight to the United States.

Mr. Guaidó accused…