Rishi Sunak says Tory leadership rival Liz Truss cannot afford tax cuts and cost-of-living help in his latest attack on her economic plans.
Mr Sunak said Ms Truss would put the public finances in "serious jeopardy" and stoke inflation if she becomes PM.
But Ms Truss's team said tax cuts were the best way to help people urgently with rising living costs.
Mr Sunak is trailing Ms Truss in polls of Tory members, with 12 days to go until voting closes.
https://www.bbc.co.uk/news/uk-politics-62628176