Christie Spars with Trump, Floats Fighting Him in Octagon

Christie said he would "kick [Trump's] a--" and referenced their ages as a factor in a potential fight.
Christie believes he would beat Trump in a UFC-style cage match and is eager to take him on in a debate or physical fight.
Christie criticized Trump's legal troubles and physical appearance.
Trump previously mocked Christie as a "failed governor" and made fun of his weight.
Christie qualified for the first GOP debate, but it's unclear if Trump will participate.