>> first, let me just address the question that is on everybody's mind at home tonight. who the heck is this skinny guy with a funny last name? >> reporter: but ramaswamy's opponents not holding back. >> i have had enough, already tonight, of a guy who sounds like chatgpt standing up here. and the last person in one of these debates who stood in the middle of the stage and said, "what is a skinny guy with an odd last name doing up here?" was barack obama, and i am afraid we are dealing with the same type of amateur. >> now is not the time for on-the-job training. >> reporter: and after ramaswamy said he would not support increased funding for ukraine -- >> you have no foreign policy experience and it shows. it shows. >> reporter: working to stay out of the line of fire, florida governor ron desantis. >> do you believe in human behavior is causing climate change? raise your hand if you do. >> look, we're not schoolchildren.