David Cameron is facing the threat of a leadership challenge following the EU referendum after the Brexit camp turned its sights on the prime minister with a series of highly personal attacks.
Bearing the hallmarks of an orchestrated campaign, Eurosceptic Tories piled pressure on Mr Cameron, including a direct threat to oust him immediately after the vote.
The ratcheting up is also a sign they are seeking to tighten their grip on the party in case of a defeat on June 23 by toppling the prime minister and replacing him with a more Eurosceptic leader.
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