Canadian senator in expenses row asks to take medical leave

A Canadian senator at the centre of an expenses scandal has sought medical leave as he and two colleagues were set to be suspended without pay.
Senator Mike Duffy said that he would be absent from work due to health concerns.
The Senate has been asked to consider a motion calling for the suspension without pay of Duffy, as well as fellow senators Pamela Wallin and Patrick Brazeau.
The trio, all appointed to the upper house by Conservative Prime Minister Stephen Harper, face a criminal probe after an audit revealed "troubling" expenses claims.
All three have been stripped of political resources but that was not enough for the public, and the Conservatives' popularity is now at a record low, polls show.
Canadian senators serve until retirement at 75 and cannot be sacked unless they are convicted of a crime or fail to attend. They can, however, resign, but Duffy, Brazeau and Wallin have refused to do so.