UK Conservative Party
The Electoral Commission said poorer people, those with disabilities and voters from minority ethnic backgrounds could be the worst affected.
Even half of Conservative voters believe it's time for a change of government.
A cross-party group said the controversial rules could affect the result of an election unless urgent reforms are made.
"Surely this book deal should have gone to the lettuce?"
The prime minister is "fired up" despite Labour's huge poll lead.
The Tories currently hold both Mid-Bedfordshire and Tamworth with huge majorities.
The former government deputy chief whip was suspended from parliament for eight weeks following groping allegations.
Moderate Conservatives MPs have warned it would be a "historic mistake".
"A Chelsea manager feels safer than a cabinet minister," Trevor Phillips told the chancellor.
Parliament returns next week with the prime minister under fresh pressure from his MPs.