There is recent precedent for that sort of perpetual protest candidacy. In 2016, Bernie Sanders didn’t concede defeat until the Democratic convention in late July, even though by every objective standard Hillary Clinton had clinched the nomination in early June. But it was a very close race that was still contested right up until the final primaries. So perhaps a better analogy for a prospective perma-campaign by Christie would be Ron Paul’s 2012 campaign, which fought for delegates — and threatened to disrupt party harmony — months after Mitt Romney had nailed down the nomination.
Then he hugged Obama after Hurricane Sandy and that was it for his political prospects. He literally and figuratively embraced the Democrats which is verboten.
Also the bridge thing and the private beach thing left him pretty unpopular in NJ