Republican presidential front-runner Donald TrumpDonald John TrumpAmash responds to 'Send her back' chants at Trump rally: 'This is how history's worst episodes begin' McConnell: Trump 'on to something' with attacks on Dem congresswomen Trump blasts 'corrupt' Puerto Rico's leaders amid political crisis MORE is sending a warning to GOP leaders about his dominance in the polls: “You’ve got to get used to it.” 

During an interview with Fox News’s Chris WallaceChristopher (Chris) WallaceTrump's tweets unify a fractured Democratic Party Top Democrat blasts Trump's 'racist tweet' about progressive congresswomen Conway: House investigations are 'combovers doing a do-over' MORE, the billionaire said Republicans are “kidding themselves” if they think he won’t secure the GOP nomination. 

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“I say, folks, you know, I’m sorry I did this to you, but you’ve got to get used to it,” Trump said. “It’s one of those little problems in life.” 

“I’m going to win. ... You know, I’m not one of these other guys that goes down. I don’t go down. I go up.”  

Trump’s interview with Wallace is set to air Sunday at 6 p.m.