Republican presidential candidate John Kasich on Wednesday likened the war against ISIS to WWII and the Holocaust when the United States took a leading role and stepped in to destroy evil.

Fresh off his primary win in the state of Ohio on Tuesday, Kasich held a town hall meeting at Villanova University in Pennsylvania on Wednesday.

Towards the end of the event, Kasich called upon an 11-year-old boy, who identified himself as Jack Shapiro, and invited him to come onto the stage to ask the final question. “In terms of your strategy for defeating ISIS, to what extent would American personnel be involved?” Shapiro asked.

“We are going to have to be in the air, and then we are going to have to be on the ground,” Kasich responded. “Americans are going to have to be there because nobody else is going to do this.”

“There’s evil. And when there is evil in the world, it has to be destroyed,” Kasich explained. “When you have got strength, sometimes you have got to shoulder more than anybody else.”

The Republican presidential hopeful then pointed to the Holocaust as an example.”There was a time when the Nazis would find out you are a Jew, they’d take you and put you in a concentration camp, and then maybe they’d take you and kill you,” Kasich said as he put his hand on the kid’s shoulder. “We can’t tolerate that, can we? And you know what? We weren’t able to win that until the U.S. stepped in.”

“The problem we have is that sometimes there’s evil in the world, evil in so many places, that we can’t wipe it all out because then we wear ourselves out and we become a policeman, and we can’t do that,” he continued. “But America has got a great responsibility because the world — whether they like it our not – the world depends on us. That means we are going to have to do more than we think we should and more than sometimes we want to.

Earlier, Kasich vowed to take his campaign to the GOP convention in Cleveland, Ohio, and secure the Republican presidential nomination. After Marco Rubio dropped out of the race, on Tuesday, Kasich maintained that he remains the only candidate that is able to win the general election against the Democratic nominee.