He was a regular fixture on television screens around the world at the beginning of the year as Donald Trump's turbulent tenure as the 45th president of the US drew to a close. But just nine months on, one of Mr Trump's closest aides is almost unrecognisable as rumours circulate he himself is planning to run for presidency. Former Secretary of State Mike Pompeo has triggered a huge social media response following his appearance on Fox News's Hannity earlier this week.