George Eaton is political editor of the New Statesman.
Even after the Copeland by-election defeat, Labour MPs believe their leader is unassailable.
The 49,000 fall in net migration will come at a cost.
Ahead of tomorrow's by-elections, Corbyn damned Theresa May for putting the service in a "state of emergency".
The French presidential candidate warned that he would not accept "any caveat or any waiver" at a press briefing in London.
The Prime Minister's confident assurances on Nato and the NHS risk making her a hostage to fortune.
As the shadow Brexit secretary sorrowfully remarked, Article 50 is "very difficult" for the party.
After her Brexit speech, the PM declared of Jeremy Corbyn: "I've got a plan - he doesn't have a clue".
In her Brexit speech, the Prime Minister raised the stakes by declaring that "no deal for Britain is better than a bad deal for Britain".
The party's poll ratings, Jeremy Corbyn's leadership and the boundary changes are pushing MPs towards the exit.
A pro-leadership candidate would strengthen his authority but would risk him owning defeat.
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