MIAMI (AP) — Six American oil executives under house arrest in Venezuela were rounded up by police hours after President Donald Trump met Venezuelan President Nicolás Maduro’s chief opponent at the White House, according to family members of the men. Alirio Zambrano said early Thursday that the executives of Houston-based Citgo were abruptly taken from their homes last night by the SEBIN intelligence police. Zambrano, the brother of two of the six detained men, said their current whereabouts are unknown. “We demand to know they are safe but more importantly their freedom!” Zambrano said on social media, adding that he...