Republican presidential frontrunner Donald Trump reportedly drew a crowd of 14,000 supporters in Columbus, Ohio, at the city’s convention center Monday.

During his speech, Trump went after those who criticized him over previous remarks he made about Muslims living in Jersey City who celebrated terrorist attacks of 9/11 fourteen years ago.

“There were people that were very, very happy and those people — not good people. So, nobody, believed me…but fortunately somebody at The Washington Post wrote that and they’ll try and deny it and say, ‘Well we made a mistake,’” Trump said

“I almost like that better. Then I can show you how dishonest they all are. I might like that better. Let them say that, but they’ll think of some reason to deny it. They’ll call it a typo.”

According to The Cincinnati Enquirer, Trump went after fellow Republican presidential candidate John Kasich, governor of Ohio. Even before Trump spoke to his Ohio supporters, he tweeted out, “Going to Ohio, home of one of the worst presidential candidates in history–Kasich. Can’t debate, loves #ObamaCare–dummy!”

“Your governor is only two [percent]. What happened?” Trump said at one point during his remarks. He added that he heard that Kasich, pronouncing the Ohio Republican’s name incorrectly as “Kas-itch,” is “dropping out.” The Enquirer reports Gov. Kasich refutes this claim.

Kasich deployed campaign surrogates and allies to attack the New York Real estate mogul Monday night, The Cleveland Plain Dealer reports. Ohio state legislators and other allies of Kasich said that Trump’s “sometimes inflammatory statements” and “attitude would make him a terrible world leader.”