2022 The Associated Press. Boris Johnson Now No 10 has said that the Prime Minister will step down if he misled Parliament, but only if he did so knowingly. Politics latest updates: Union leader Pat Cullen says nurses are Both Sunak and Javid have been seen as possible leadership contenders within the Conservative Party if Johnson is forced out. Boris Johnson has revealed to a close political ally that he is going to run in the Conservative leadership contest to replace Liz Truss as he seeks a return to Number 10. Your browser does not support the