Donald Trump's endorsement of a phone marketing company pursued by the Australian consumer watchdog for allegedly operating as a pyramid scheme, has put the American presidential candidate's business dealings under new scrutiny. Mr Trump earned more than a $1 million from promoting ACN, a North Carolina multilevel marketing firm that the former reality TV show host trumpeted as making "amazing" video phones. "I simply can't imagine anybody using this phone and not loving it," Mr Trump reportedly said in 2011, as part of a promotion tied to the Celebrity Apprentice show he fronted. However, the video phone failed to be...