The way a presidential candidate campaigns for office matters to the country. A campaign should demonstrate seriousness of purpose and a set of core beliefs, and it should signal to voters whether a candidate shows trustworthiness and judgment. Those things don’t seem to matter to Mitt Romney.

From the beginning of his run for the Republican nomination, Mr. Romney has offered to transfigure himself into any shape desired by an audience in order to achieve power. In front of massed crowds or on television, he can sound sunny and inclusive, radiating a feel-good centrism. His “severely conservative” policies and disdain for much of the country are reserved for partisans, donors and the harsh ideologues who clutter his party’s base. This polarity is often described as “flip-flopping,” but the word is too mild to describe opposing positions that are simultaneously held.

The best way to judge candidates is not by the popular way they describe their plans near the end of a campaign; it is by the most divisive presentations of themselves earlier on. A candidate’s political calculations when fewer people are watching is likely to say far more about character than poll-tested pleasantries in the spotlight.

That’s what is disingenuous about the “Moderate Mitt” in recent speeches and the first presidential debate. He hasn’t abandoned or flip-flopped from the severe positions that won him the Republican nomination; they remain at the core of his campaign, on his Web site and in his position papers, and they occasionally slip out in unguarded moments. All he’s doing is slapping whitewash on his platform. The immoderation of his policies, used to win favor with a hard-right party, cannot be disguised.