The US midterms are approaching and polls suggest the Republican Party could take control of the House and could even secure the Senate too. But has the party gone from the grand old party of Abraham Lincoln to more like a Donald Trump fan club? What comes next?   In today’s episode, we speak to the Republican pollster and strategist Whit Ayres, about the shifting nature of the party, from Ronald Reagan to Donald Trump.    We ask him whether the Republican Party is now fully beholden to Trump or whether there are signs his grasp is weakening.   Sources: AP Archive, AP, CNN   Producer: Nina Hodgson