Mr Sunak has stated throughout his campaign that he is in favour of tax cuts, but only after bringing inflation under control. Ms Truss, meanwhile, has said that tax cuts would decrease inflation.
On the subject of China, the Foreign Secretary accused her former cabinet colleague of “pushing for closer trade relationships”.
Mr Sunak said Ms Truss had “been on a journey” to get to a point where she opposes closer ties.
Mr Sunak also sought to stress his decision to quit Mr Johnson’s government as a sign he acts according to his principles while Ms Truss stressed her loyalty to her current boss.