George Eaton is political editor of the New Statesman.
Leavers are targeting all those deemed ideologically impure: MPs, the judiciary and the civil service.
The party held Copeland by just 2,564 votes in 2015.
The German Chancellor defends her refugee policy after being accused of allowing terrorism "to thrive".
The Prime Minister's small majority, "pro-worker" stance and Brexit are all reasons not to act.
Last night's by-election results show the party can triumph by building anti-Tory coalitions.
Ministers show no inclination to raise the revenue required.
The Labour leader won the final session of the year as he told the PM: "Get a grip and fund it properly".
Both leaders offered a rupture with their parties’ past. But there has been greater continuity than anticipated.
An interim deal would provide Ukip with an easy target at a 2020 general election.
Paul Nuttall's party is set to beat Labour into second in the Sleaford by-election. But MPs fear far worse is to come.
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