OTTAWA - Immigration Minister John McCallum wants the Senate to come to the aid of Canadians who are being stripped of their citizenship without a hearing.

And, in the meantime, he says he'll consider imposing a moratorium on the practice.

Independent Sen. Ratna Omidvar, who is sponsoring another citizenship-related bill in the upper house, is planning an amendment that would allow those deemed to have misrepresented themselves to appeal a decision to revoke their citizenship.

McCallum, who was grilled by senators Tuesday, says he'd welcome such an amendment.

Revocation without a hearing was part of a citizenship bill passed by the previous Conservative government. The provision was denounced by the Liberals when they were in opposition but lawyers say they've been aggressively enforcing it since forming government.

The British Columbia Civil Liberties Association and the Canadian Association of Refugee Lawyers last week launched a constitutional challenge to the law, which they argue violates the Charter of Rights and Freedoms.