US Senator Lindsey Graham speaks to Hardtalk about the foreign and domestic impact of President Trump. Senator Graham made an unsuccessful bid for the Republican presidential nomination in 2016 but remains an influential voice inside the party. He has been openly critical of President Trump but has also praised him on some aspects of foreign policy. Where does America go from here as tensions with North Korea escalate?(Photo: Senator Lindsey Graham holds a press conference, Washington DC, 2017. Credit: Chip Somodevilla/Getty Images)