It was an ugly incident unlike anything seen in presidential politics in decades. Trump denied any responsibility for the clash.
He also says that Trump's campaign "worries me for America, it worries me for the world, it worries me for Mexico."
Cruz boasts of having 160,000 volunteers and collecting more than 600,000 contributions nationwide.
Steven Tyler, who is a registered Republican, attended the GOP contenders' first debate in August.
The "Know the Facts" campaign looks into demotivating irregular immigration
"A lot of these people who are here are some of the hardest-working, God-fearing, family-oriented people you can ever meet," Kasich also said.