This is what I said last year at budget time.
The CPC shouldn't just rely on BQ support for the budget because the last thing you want is someone to say that this budget "lacks legitimacy". By not relying on the BQ for support (who have already publicly endorsed the budget), the CPC can campaign on the fact that they represent Quebec views better than the separatists as recent polls seem to indicate.
I've long since given up any hope of a Senate seat anyway, so I can say what I want. :)