He's a former national director of the Canadian Taxpayers Federation, but the public purse watchdog group says Calgary MP Jason Kenney should be investigated over possible mis-use of public money.

CTF Alberta Director Scott Hennig is responding after it was learned a Tory fundraising letter from Kenney was sent on the Federal Immigration Minister's MP letterhead.  A copy of the letter, intended for Conservative MP John Duncan went instead to NDP MP Linda Duncan.   Hennig says the federal ethics commissioner should investigate.

Kenney has apologized saying a staffer responsible for the mix-up has resigned.  However, Kenney is refusing to bow to opposition demands that he step down as minister.