By Morgan Little
September 9, 2012, 10:03 a.m.

The cross-country spat between California Gov. Jerry Brown and New Jersey Gov. Chris Christie briefly stepped back into the spotlight Sunday, with Brown reiterating his invitation for a gubernatorial gauntlet of physical challenges.

Christie sparked the repartee between the two by calling Brown “an old retread” during the Republican National Convention, pointing out to California delegates that he was just 14 years old when Brown challenged incumbent Jimmy Carter in the 1980 Democratic presidential primary. Christie also attacked Proposition 30, Brown’s tax increase initiative, as a cowardly avoidance of the state Legislature.

Brown, who has been spiritedly defended by prominent California political figures, was asked about the back-and-forth Sunday during an appearance on CNN’s “State of the Union” with Candy Crowley.

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