Senator Ted Cruz is the most interesting candidate in the US presidential race right now. As a darling of the Tea Party, in 2012, he swept into the Senate, representing Texas, having campaigned on deeply conservative principles and policies. At the time, many dismissed him as a rabble-rouser who would wind up as a less successful version of George W Bush. Now, not only is he leading in the polls in Iowa, but he has also beat out senator Marco Rubio as the dark horse of the race thus far. Cruz has been criticised for having some of the most...