Dominic Cummings: Is he, as some suggest, the disruptor's disruptor - a strategically single minded and ideologically iconoclastic man?Or is he an unelected foul mouthed liability who has no place at the heart of a conservative Downing Street?On this week's episode of TheJournal.ie, we look at Boris Johnson's special adviser and his career. To help make some sense of Cummings and his very important and strategic role, presenter Sinéad O'Carroll is joined in studio by our Brexit reporter Grainne Ni Aodha, and Dr Kevin Cunningham, TU Dublin politics lecturer.We also chat to Tom Chivers, science writer and journalist, to get his thoughts on what makes Cummings tick.