The US and its hemispheric allies want to send humanitarian aid across the Colombian border into Venezuela, but President Nicolas Maduro is shut the frontier to keep out the needed, but he says, humiliating offer of food and medicine.  Joshua Goodman, Andean News Director for AP, the Associated Press reports from Caracas on a political crisis that seems to be getting worse.  The US is strongly supporting National Assembly President Juan Guaido’s claim that he is the legitimate interim leader of Venezuela.