I would suggest strongly that Mssrs Layton and Harper review this section of the Constitution before they go off on their next little tirade about senate reform or abolition thereof.
In particular, I would draw their attention to the following sections:
(1) An amendment to the Constitution of Canada may be made by proclamation issued by the Governor General under the Great Seal of Canada where so authorized by
(a) resolutions of the Senate and House of Commons; and
(b) resolutions of the legislative assemblies of at least two-thirds of the provinces that have, in the aggregate, according to the then latest general census, at least fifty per cent of the population of all the provinces.
(1) An amendment to the Constitution of Canada in relation to the following matters may be made only in accordance with subsection 38(1):
(a) the principle of proportionate representation of the provinces in the House of Commons prescribed by the Constitution of Canada;
(b) the powers of the Senate and the method of selecting Senators;
(c) the number of members by which a province is entitled to be represented in the Senate and the residence qualifications of Senators;
(d) subject to paragraph 41(d), the Supreme Court of Canada;
(e) the extension of existing provinces into the territories; and
(f) notwithstanding any other law or practice, the establishment of new provinces.
If you thought the arguments over Meech Lake or Charlottetown were nasty, I suspect it would be nothing compared to the debates that would rage over restructuring parliament.
Harper, and Layton, dream of making their mark in history - I would suggest that they both start by knocking off the rhetoric and taking the time to start understanding this nation's Constitution. Even if they were to make a motion to abolish the Senate, that is only one step in a long process - which, I suspect, only a handful of provincial legislatures would agree to readily.
I'm not saying that changing the senate is necessarily a bad thing, but it has to be crafted carefully, and with a great deal of deliberation. Simple abolition would place Canada in the unique place of being the only large democracy without an upper house that can act in counterpoint to the often fractious House of Commons. That would not be good for Canada in the long run.