Republican presidential candidate Ohio Gov. John Kasich called the notion that he should exit the presidential race “nuts” during an interview on CNN’s “New Day” Monday.

“You said it would be hard for any candidate to get to the magic 1,237 number by the contest, but it is not impossible for Donald Trump. It is mathematically possible for him to get to that still, isn’t it?” Alisyn Camerota asked.

“Everything is mathematically, how many times can we float around the moon or something, mathematically?” Kasich replied. “Who cares about that? He’s not going to have enough delegates. He’s gonna go there without enough delegates. And let me tell you, we have had 10 Republican conventions, and only three times of those 10 has the front-runner been selected at a convention.”

Kasich said that the delegates at the convention take their responsibility “seriously” and that he is the only one “who can win in the fall.”

“Now, if I’m the only one that can beat Hillary in the fall, why would anybody say I should leave?” Kasich said. “That’s nuts, OK? I’m not going anywhere.”

Kasich said that “I believe I will be selected” at a contested convention.

“Everybody just, you know, relax,” Kasich said. “The fact is, is that I have the vision, the message, and the record, and we’re probably going to go to a convention.”

Kasich currently has 143 of the 1,237 delegates needed to secure the Republican nomination, fewer than Florida Sen. Marco Rubio, who suspended his presidential campaign last week.