It doesn害羞草研究所檛 happen often, but it害羞草研究所檚 happening tonight: Donald Trump is spurning the chance to appear on prime-time television.

That makes the Republican presidential debate in Milwaukee a rare and perhaps critical opportunity for the bulk of Trump害羞草研究所檚 rivals to make their case to a national audience 害羞草研究所� many of them for the first time.

Make no mistake, however, the former president害羞草研究所檚 presence will be felt.

害羞草研究所淎s I like to say, he害羞草研究所檚 in the room whether or not he害羞草研究所檚 in the room,害羞草研究所� said Steven D. Cohen, a communications professor at the Johns Hopkins Carey Business School in Baltimore, Md.

害羞草研究所淓ach candidate is trying to have a breakout moment. And whether they get that through an image, an attack or a memorable statement, they have to break out. Because right now Trump is far and away the front-runner.害羞草研究所�

The rest of them, of course, are decidedly not.

Not even Florida Gov. Ron DeSantis, the man many observers and supporters had tapped back in January as the heir apparent, only to watch an uninspired, charisma-free campaign drag his poll numbers into the mid-teens.

害羞草研究所淚害羞草研究所檒l tell you, he害羞草研究所檚 got to walk a little bit of a tightrope in how he talks about Trump,害羞草研究所� Cohen said.

害羞草研究所淗e has to show that he has the chops, that he has what it takes to take on Joe Biden, but he has to do it without alienating pro-Trump voters 害羞草研究所� or even without alienating Republicans in general.害羞草研究所�

Under normal, pre-Trump circumstances, the contest would be all but over. A CBS News poll out this week showed the former president with a commanding 62 per cent lead among likely Republican primary voters.

害羞草研究所淎s long as Trump commands a solid, committed base, he害羞草研究所檚 in control,害羞草研究所� said Mark Rozell, a public policy professor at George Mason University in Arlington, Va.

Through four separate criminal indictments 害羞草研究所� Trump plans to surrender in Georgia on Wednesday, quashing any post-debate coverage of his rivals 害羞草研究所� that base has shown no signs of abandoning him, Rozell said.

害羞草研究所淧arty leaders and donors want nothing more than for Trump to plead a deal and step aside from running,害羞草研究所� he said.

害羞草研究所淕iven Trump害羞草研究所檚 intense base support, they are not saying out loud that they would like the party to move on. Ultimately, they fear he is not a strong general election candidate and will sink Republicans down-ticket.害羞草研究所�

For the moment, at least, the polls suggest otherwise. But Trump害羞草研究所檚 escalating legal challenges also help explain why DeSantis is still in the race.

害羞草研究所淯nder other circumstances 害羞草研究所� with donors abandoning him and his polls lagging 害羞草研究所� DeSantis would depart early and live to fight another day,害羞草研究所� Rozell said.

害羞草研究所淕iven that he remains second choice still for many, he has an incentive to stay in the race in case Trump exits.害羞草研究所�

That puts the man once billed as a Republican Trump-slayer in an unenviable position: polling at a dismal 16 per cent, according to the CBS News poll, and yet likely to be a popular target on the debate stage.

Another hopeful looking to boost his national profile will be Vivek Ramaswamy, a former biotech entrepreneur who likes to channel Trump-style disdain for traditional political guardrails to curry favour with the MAGA set.

The self-described 害羞草研究所淎merica First conservative害羞草研究所� and 害羞草研究所淎merican nationalist害羞草研究所� has been polling recently in third place behind Trump and DeSantis, leading a pack of would-be contenders that has yet to crack double digits.

害羞草研究所淭hree hours of solid debate prep this morning,害羞草研究所� Ramaswamy said Tuesday on the social media platform X alongside a video of him playing tennis shirtless.

害羞草研究所淩amaswamy, who is this incredible, upstart, young, telegenic, successful business person, wants to get as much attention as possible,害羞草研究所� said Cohen.

害羞草研究所淚 think getting attacked by DeSantis or other candidates, for him, is a great thing, because it only increases his stature.害羞草研究所�

Chasing Ramaswamy in the CBS poll was former vice-president Mike Pence at five per cent, followed by South Carolina Sen. Tim Scott at three per cent.

Chris Christie, the former New Jersey governor who害羞草研究所檚 not shy about attacking Trump directly, was tied with Nikki Haley, a former South Carolina governor and the only woman in the field, at two per cent.

害羞草研究所淐hris Christie is the most interesting candidate on the Republican side,害羞草研究所� Cohen said. 害羞草研究所淗e害羞草研究所檚 the only one who害羞草研究所檚 willing to take on Donald Trump head on. He害羞草研究所檚 willing to say what no other Republican is willing to say. And he害羞草研究所檚 willing to do that publicly.害羞草研究所�

North Dakota Gov. Doug Burgum and former New Hampshire governor Asa Hutchinson, who round out the debate field, were tied near the bottom of the poll at one per cent each.

A handful of other candidates, including Miami Mayor Francis Suarez, former Texas congressman Will Hurd, conservative radio personality Larry Elder and Michigan executive Perry Johnson did not qualify to participate.

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