David McCullagh joins the News Xchange line-up to interview former UK Prime Minister Liz Truss. David presents RTÉ's flagship news progamme the Six One News. David graduated with a PhD in Politics from University College Dublin. He worked at the Evening Press newspaper from 1989 until he joined RTÉ in 1993 as reporter for RTÉ News on television and on radio. He went on to be RTÉ News Political Correspondent for 12 years before joining current affairs television series Prime Time in 2013. In 2018 he rejoined the This Week team on RTÉ Radio 1 as a presenter of Ireland's longest running current affairs programme. He also presents general, European and presidential election coverage for RTÉ.