CLEVELAND — There’s never been a primary season presidential debate with the buildup and sense of anticipation of the Fox News face off tonight at the Quicken Loans Arena. Some political veterans here in Cleveland have noted that the event has a general-election feel, with a huge press contingent and the attention of the entire political world. There’s an unmistakable feeling of excitement.

But some of the stars of the show — that is, the Republican presidential candidates themselves — would be perfectly happy if it turns out to be a very boring affair. Conversations with aides from some of the leading campaigns suggest that, while they know the presence of Donald Trump makes the primetime debate unpredictable, they have a hunch — and certainly a hope — that it could be a pretty well-behaved and fireworks-free discussion. And that would be absolutely fine with them.