Romney traveled to Bernardsville, N.J., for the $5,000-per-plate dinner, where about 80 supporters showed up.

A close friend and ally of Gov. Chris Christie (R-N.J.), another Romney backer, Kyrillos is running to unseat Sen. Robert MenendezRobert MenendezThe right person for State Department is Rudy Giuliani Warren, Menendez question shakeup at Wells Fargo Democrats press Wells Fargo CEO for more answers on scandal MORE (D-N.J.), who is seeking his second term in the Senate.

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Christie has been fundraising for Kyrillos, too, but Menendez has a more than 4-to-1 advantage over Kyrillos in cash on hand.