For all that’s been said about the lessons of Northern Territory Labor’s near-defeat a fortnight ago, expectations that Alan Carpenter’s government will be comfortably returned in Western Australia are dying hard.

Saturday’s Newspoll showed 61 per cent of respondents expecting a Labor win, compared with 21 per cent for the Liberals. However, the poll put Labor’s two-party lead at just 51-49, and it was echoed by a 50-50 Westpoll result published the same day in The West Australian. This doesn’t seem to have impressed betting agency Centrebet, which has not revised its starting price of $4.25 for a Liberal win.

With just over a fortnight to go, Labor is taking to such perceptions with an axe. The process began on Wednesday when Alan Carpenter told television reporters his party faced a “knife-edge political situation”, and said he “always believed that we could lose”.

It was ratcheted up a notch yesterday morning when the ABC was told Labor had abandoned its most marginal seat of Kingsley to direct resources where it still had a chance. “Concern” was also expressed over Ocean Reef, Swan Hills, Riverton and Jandakot. The latter was particularly interesting, as just two weeks ago the party was trumpeting a 56-44 lead fuelled by gratitude over the Mandurah railway and Fiona Stanley Hospital projects.

Then came the real bombshell, courtesy of Geof Parry on the Channel Seven news: leaked polling across the five seats showed a swing to the Liberals of 7 per cent, which if consistent would give them 32 seats out of 59 along with another three for the Nationals. This was accompanied by findings that 57 per cent of respondents still expected Labor to win, while only 25 per cent thought the Liberals “ready to govern.

Later in the evening, a Labor candidate using a pseudonym wrote on my blog that the party’s strategy group was “cr-pping itself” over the data, which was “very real” and “not a tactic to scare voters”. Particular concern was expressed over the strategists’ failure to scotch the snowballing perception of Alan Carpenter as “arrogant” — a theme which has developed a life of its own since the early election was announced a fortnight ago.

When respondents to Saturday’s Westpoll survey were asked unprompted to name the single issue that would most influence their vote choice, fully 10 per cent responded with some variation on “Govt/Carpenter arrogance”. The apparent potency of this message has not been lost on the Liberals: the word “arrogant” appears twice, delivered with carefully modulated emphasis, in their latest 30-second radio advertisement.

Of course, the polling leak and accompanying talk of internal panic might just be a ruse to boost Labor’s winning margin rather than avert defeat. On the other hand, the shift to the Liberals recorded in last weekend’s polls was entirely consistent with the anti-Troy Buswell effect that was well understood to be at work in the preceding surveys. We have evidence now that is not merely anecdotal that the perception of arrogance is starting to bite. And those generous odds from Centrebet are still there for the taking.