The Canadian flag at the Peace Tower in Ottawa. Advocates want a senate committee to make changes to a bill so children adopted from abroad don't lose citizenship rights.

Parents who adopt children from abroad say Ottawa’s “Lost Canadians” bill gives their kids fewer rights to pass on citizenship than those adopted from within Canada, as lawyers and politicians warn that the distinction could prompt a legal challenge.

A senate committee, which is to scrutinize the bill next week, is being urged to make changes so that all children adopted by Canadian families have the same citizenship rights.

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Bill C-3, which has already been through the Hou

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