“One of Venezuela’s most powerful leaders may have put out an order to kill Florida Sen. Marco Rubio, a fervent critic of the South American country’s government, according to intelligence obtained by the U.S. last month,” the Miami Herald reports. “Though federal authorities couldn’t be sure at the time if the uncorroborated threat was real, they took it seriously enough that Rubio has been guarded by a security detail for several weeks in both Washington and Miami.”