The London mayor would be forced to break his "solemn vow" to serve a full term were he to become leader of his party.
The Foreign Secretary says "I don't think the invasion itself was a mistake".
The mayor of London is not the first to throw a tantrum over ‘call-out culture’ in a growing backlash against online communities condemning racist, sexist, homophobic and transphobic behaviour.
The mayor of London Boris Johnson has scribbled a poem for his friend's book launch, but it has nothing on the poetry some politicians, both here and across the pond, have written over the years. Here are some of the best (or worst) bits.
Mayor concedes "sometimes I don't go in" after being challenged by Ken Livingstone on his LBC phone-in show.
Former Mayor of London describes his old foe as "a fairly lazy tosser who just wants to be there".
Mayor of London has worked from home despite denouncing the practice as a "skivers' paradise".
Ken Livingstone’s political career is over – but he still talks a good game. Here he praises Ed Miliband, traduces Boris Johnson and explains his big idea for reviving Britain.
The Tories should start preparing for the possibility of a mayoral by-election next year.
Conservative peer also says that Britain will join the euro, that UKIP is a "racist" party and that Boris Johnson shouldn't stand for parliament before 2016.