Brexit news: Boris Johnson has been threatened by Tory MPs who said they will quit if he becomes PM (Image: GETTY)
Former foreign secretary, Mr Johnson, is a firm favourite to replace Theresa May as leader of the Conservative party. But Prisons Minister, Rory Stewart, has suggested he would quit if Mr Johnson became leader, according to The Sun. Mr Stewart told the BBC: “I would find that difficult if he were campaigning for a No Deal Brexit.
"Becoming a hard Brexit party isn't just about Brexit, it carries with it a whole series of statements about polarising extreme right-wing politics.
"I'd find it very difficult to stay, I'd have to look at what he was doing.
"The important thing is to have moral principles and for me the red line is campaigning for a No Deal Brexit."
Dominic Grieve also said he would resign if Mr Johnson becomes leader.
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