Lawyers are investigating whether Nadine Dorries broke the law by sending "forceful" messages to senior civil servants after she was snubbed for a peerage.
MPs heard she had "threatened" to use her TV show and her position in the House of Commons to "get to the bottom" of why she wasn't granted an honour in Boris Johnson's resignation list.
Angry Ms Dorries announced she would stand down as an MP with immediate effect after her elevation was blocked - but is yet to do so. In the aftermath she launched a scathing attack on Rishi Sunak, dismissing him as a "privileged posh boy" after her nomination was blocked.
