Donald Trump’s presidential campaign is in the middle of a much-discussed reworking. There’s a lot of reworking to do. But Trump, who now has the advice of several political professionals recently brought into the campaign, faces a risk of doing too much; he has to walk a fine line to fix his problems without changing the essential character of a campaign style that made him the frontrunner in the Republican race.

A lot of the Trump comments that set off firestorms in the last nine months weren’t really big, lasting problems for the campaign. A few examples: Trump’s diss of John McCain, his feud with Megyn Kelly, his allegations concerning Mexican immigrant crime, his mocking a New York Times reporter’s disability, his claim that Muslims in the New York area celebrated Sept. 11, his boast that he could shoot someone on Fifth Avenue and his supporters would remain loyal, his charge that George W. Bush lied about the Iraq war — it’s a very long list. One could argue that they had a cumulative negative effect on Trump’s image, but one could also argue that they were a net plus in terms of cementing loyalty among his supporters.