SBS's Amos Roberts heads to Iowa to gauge the temperature on the upcoming US midterm elections. Billed by the media as a referendum on the Trump administration with talk of a 'Blue Wave' amongst the punditry, few are under any doubts as to the significance of these elections. As a state that went twice to Obama and then to Trump, Iowa is an exemplary case study in the how traditional political allegiances have been severely disrupted in the Trump era.