That's precisely how the last mayoral election vote broke down -- literally none of the wards in the old City of Toronto voted for Ford, and almost all of the wards in the amalgamated suburbs did. The separation was a stark and near-perfect correlation between city vs suburb.
See
this very revealing map for the truth of this.
And as per my US comparison point:
big freaking deal. If that's the case, then
every political jurisdiction with stark city/suburb or city/rural divisions should break up in the name of thoroughly balkanized, big-sort politics.
The point is not to "negatively accept" those divides.
The point is to bridge them.
And for the left, it isn't even a matter of winning the "outer wards" per se, much less equalling downtown-ward tallies:
it's about earning enough mandate and respect out there to enable getting over the top at large.
You have to remember: fifteen years ago, Megacity seemed to mean bye-bye, finito to any chance of a left-of-centre mayor, again. IOW we were apparently doomed to an endless pattern of Mels and John Torys and Rob Fords, with no relief in sight.
Yet in 2003...Mayor Miller. I mean, true: there was a Tory/Miller equivalent of said "very revealing map"--most of the wards in Scarborough, North York, Etobicoke opted for John Tory. But...Miller got the "enough mandate and respect" to put him over.
In other words...it's possible. And Ford Nation is but a loudmouthed-schnook smokescreen.
And the key element is out of the Ford Nation sloganeering songbook: Respect For Taxpayers, and those who represent said taxpayers. And
real taxpayers, not the Ford-ish euphemism.
And that's what made Miller succeed: he respected them.
Throughout the city. As an urban lefty, he didn't wage wars against suburban righty. And so did, in practice, Mel Lastman--as megamayor, he was a coalition-builder, even in his lame-duck later years.
It's about bridging and understanding, not blithe dismissal. I think that in decrying the present "hopeless" situation, too many of us are acting like "80s municipal Jack Layton"--maybe it'd be more useful to learn from 90s municipal Jack Layton, he who became head of the Federation of Canadian Municipalities largely through beyond-partisan bridge-building. Which, of course, served as a foundation for the federal NDP leadership--and lest we forget, a lot of those wards and polls which supported Ford in 2010 supported, or gave hitherto-federally-unprecedented mandates to, the NDP six months later. (Sure, it was the dreaded Conservatives that actually won a number of those seats; but, still.)