Donald Trump could find his claim to the presidential nomination in jeopardy if he comes into this summer's convention a couple hundred delegates short of 1,237, former Republican National Committee chairman Michael Steele said Friday.
"If Donald Trump goes in there short 200-plus delegates, then it's a whole different ballgame," Steele told CNBC's "Squawk Box." He said if Trump were only 100 delegates short of the magic number it would be hard for party leaders to deny him the nomination.
Trump has 756 delegates, Sen. Ted Cruz has 545 and Ohio Gov, John Kasich 143, according to NBC News.
Trump has been helping his case with GOP establishment officials by acting more presidential recently, Steele said, citing the billionaire real estate mogul's actions Thursday night at a Republican fundraiser in New York City.
"It was interesting because, at the beginning, he did his like 15-minute riff on building buildings here in New York," Steele said. "And then he turned his head down and started to read notes and text. And I was like, wow … because he never does that."
Trump is starting to see himself in the role of president and "doing the disciplined things you need to do," Steele said.