He said they call into question the Prime Minister's decision to appoint Mr Crosby to run the Conservative election campaign in 2015.
These are very serious allegations, which call into question the Prime Minister's decision to appoint Lynton Crosby.
These allegations must be investigated and if they are true, David Cameron must condemn them.
Appointing the arch right-winger who ran the Tories' 2005 election campaign shows once again that David Cameron can't be the One Nation Prime Minister Britain needs.
More top news
Mack entered her plea in federal court in Brooklyn. The judge refused a request by her lawyers to release her without bail.
Officers investigating a reported break-in on Friday found 22-year-old Roger Alvarado asleep in the pop star's home in Tribeca.
Billy Jeeves is said to have fled the scene in Hither Green, south-east London, after Henry Vincent was fatally stabbed by the pensioner.