Former President Donald J. Trump, lengthy the dominant front-runner within the Republican nominating contest, has made it clear for months that he’s itching to concentrate on a probable basic election matchup between him and President Biden.

On Saturday, he’ll marketing campaign in Nevada, a vital battleground state. But first he’ll want at the least a handful of his supporters to prove for the nominating caucuses within the state on Feb. 8 — and his final remaining Republican rival for the nomination, Nikki Haley, is doing everything she can to remind him she’s nonetheless within the race even when they received’t meet head-to-head in Nevada.

Off the path on Friday, Ms. Haley assailed Mr. Trump as “unhinged” on Fox News as she continued to try to bait him right into a one-on-one debate. Mr. Trump was in a New York City courtroom, however his marketing campaign despatched out e-mail blasts pointing to articles that appeared to bolster the case that she ought to cede the race to him, and attacking her on immigration.

“There’s one thing Americans know — Nikki will always put America last,” Steven Cheung, a Trump spokesman, wrote.

There are two contests arising in Nevada: the caucuses, and a presidential main on Feb. 6. The presidential main options Ms. Haley on the poll, however received’t depend towards the G.O.P. nomination, so she is skipping the state solely. The caucuses characteristic Mr. Trump and not using a single main competitor — and that’s the competition that can decide who will get the state’s delegate prize.

Critics have argued that the state celebration arrange the caucuses to profit Mr. Trump — which the celebration denies.

“Nevada will certainly be a good messaging opportunity for Trump, because he’s going to win all the delegates here, and he will win unopposed,” mentioned Jeremy Gelman, an affiliate professor of political science on the University of Nevada, Reno. “He will be able to say he swept Nevada.”

Still, the specter of Ms. Haley’s continued presence within the race is more likely to grasp over Mr. Trump’s speech on Saturday, his first marketing campaign occasion since profitable in New Hampshire, the place he beat her by 11 share factors.

The former president and his staff have been hoping his displaying there would persuade Ms. Haley to finish her marketing campaign. But she vowed to maintain combating, drawing Mr. Trump’s ire.

“I don’t get too angry,” he mentioned on Tuesday. In a sign of the chance that he would proceed escalating his assaults towards her, he added: “I get even.”

On Saturday, she will probably be throughout the nation, holding a rally in her house state of South Carolina, the location of her subsequent electoral battle with Mr. Trump on Feb. 24. Back in Las Vegas, he’ll share a special break up display, this one with Vice President Kamala Harris.

Ms. Harris will attend a get-out-the-vote occasion at a labor union headquarters meant to encourage turnout in Nevada’s Democratic main.