UPDATE 10:13 p.m.: Christie has hopped on the "childish" bandwagon by shading Trump and Carly Fiorina who were bickering after being asked about their respective business experience.
Trump pointed out Fiorina ran Hewlett Packard into the ground as CEO, eventually getting fired. Fiorina shot back by saying Trump is incapable of running the country's finances when he can't even handle his own, citing his four bankruptcies.
That's when Christie had enough saying,
When Fiorina tried to talk back Christie snapped saying she was not going to interrupt him. He then continued to call her and Trump "childish" and demanded they get to the real issues, causing the crowd to cheer.
See original story below.
The Republican debate main stage saw the top 11 candidates facing off in this second round. Donald Trump came out swinging from the gate—despite saying he would gain some chill—when he burned Sen. Rand Paul questioning why he was even on the main stage considering he was number 11 and was only polling at “1%”
When Paul called out Trump for his “careless” language and his entertaining “sophomoric” behavior for taking a cheap shot at him Trump fired back with another “junior high” diss saying, “I never attacked him on his look, and believe me, there’s plenty of subject matter right there,” getting big laughs from the crowd.
Trump also took a jab at Jeb Bush, who you'll recall called Trump an "asshole," when the two got into an argument about casinos in Florida. When Bush kept going toe-to-toe with him Trump said, “More energy tonight. I like that,” a reference to when a Bush supporter fell asleep at a rally. Trump made fun of the "low energy" Bush and made a video surrounding the incident.
You can watch the exchange between Trump and Bush below: