U.S. Senator Rubio, other officials visit site of Venezuelan aid

While Venezuelan President Nicolas Maduro is refusing to allow in the food, medicine and other supplies, opposition leader and self-declared president Juan Guaido has vowed to move hundreds of tonnes of the aid into the country on Feb 23.Guaido, who argues that Maduro's 2018 re-election was a sham, invoked constitutional provisions to declare himself the country's leader last month.Most Western countries and many of Venezuela's neighbors have recognized Guaido as the legitimate head of state, bu