Voter ID
The former president made a bonkers claim about grocery stores as he took aim at Democrats during a D.C. summit on Friday.
The Electoral Commission said poorer people, those with disabilities and voters from minority ethnic backgrounds could be the worst affected.
A cross-party group said the controversial rules could affect the result of an election unless urgent reforms are made.
"It looks like a transparent attempt at voter suppression by Conservative ministers," said the Lib Dems.
Jacob Rees-Mogg had suggested the policy was an attempt to improve the Conservatives’ electoral chances.
Lord Cruddas seemed to concede that it was designed to suppress anti-Conservative support.
His comments came ahead of Thursday's local elections.
Party officials blamed a "printing error" for the misleading election leaflet.
From 5pm today, online applications for free voter ID will close.
Polling stations are drafting in extra staff to help voters with the government's new rules.