You'll know Labor is concerned about about voter base erosion if they start talking about One Nation and not the Coalition. If Labor loses a fair bit of the blue collar vote, some might go to One Nation. But if they get tired of that, they might walk past the Coalition on the way back and stop there for a while. Either way, it's no time for the true believers to be gloating. I don't think they are, they seem to be taking a bit of notice of what's happening lately.