Nadine Dorries, the Tory backbencher, is thought to have wrecked her political future after she claimed that MPs were victims of a "McCarthy-style witch-hunt" over their expenses.
The Conservative Party is deeply embarrassed by comments that the MP for Mid-Bedfordshire made. She warned that the relentless drip-feeding of embarrassing expense claims was creating such an atmosphere of terror that there was a real risk of an MP committing suicide.
Soon after Ms Dorries made the remarks, David Cameron ordered a public statement that would distance the Tory party from the backbencher, insisting that the fact that she had found it necessary to commit political suicide was up to her.
According to an inside source, party officials have had conversations with Ms Dorries on a number of occasions to censure her "increasing tendency to make wild and eccentric statements".