Venezuela expelled a group of visiting European lawmakers Sunday, as political tensions over the leadership crisis continue to mount. Meanwhile, the U.S. is continuing to deliver aid to the Colombian border with Venezuela in defiance of sitting President Nicolás Maduro. The United Nations, the Red Cross and other relief organizations have refused to work with the U.S. on delivering aid to Venezuela, which they say is politically motivated. The AP is reporting that U.S. military aircraft are now being used to transport U.S. supplies to the region. Opposition leader Juan Guaidó spoke at a rally in Caracas Saturday, calling for a “million volunteers” to go and retrieve international aid at the border on February 23.