By TYLER PAGER U.S. officials say they are frustrated with María Corina Machado, the exiled Venezuelan opposition leader, for requesting help facilitating her return to Venezuela in the aftermath of two devastating earthquakes, according to two White House officials. They said Machado’s multiple requests were ill-timed, and one official called them a “political stunt.” The United States, as well as dozens of other countries, had been focused on giving aid to Venezuela on Saturday. At least…
