New Jersey Democrats are calling on Gov. Chris Christie (R) to cancel an appearance Thursday at a fundraiser for Rep. Steve King (R-Iowa), who they are denouncing as an "extremist" and "radical right-wing zealot."

U.S. Sen. Frank Lautenberg (D-N.J.) and New Jersey Democratic State Chairman John Wisniewski held a conference call with reporters Wednesday afternoon to call on Christie to cancel his trip to the Iowa fundraiser where he is scheduled to give the keynote address. Lautenberg and Wisniewski cited King's conservative viewpoints on a series of issues including abortion, rape and spending as reasons to call on Christie to stay in New Jersey.

"New Jersey's economy is worsening as the governor travels the country pushing his personal agenda," Lautenberg said. "He is hosting a fundraiser for a right-wing extremist that is out of step with New Jersey. He is out of step with Iowa. Frankly, I can't believe that Republicans in New Jersey would not agree that Steve King represents the worst in American politics."

King is facing a tough challenge in November from former Iowa first lady Christie Vilsack (D).

Assembly Majority Leader Louis Greenwald (D-Voorhees) joined the two in their criticism of Christie and King, who released a statement earlier on Wednesday. The three hinted that the real reason behind Christie's trip is to lay the groundwork for his 2016 presidential run.

"Governor Christie's first priority is not New Jersey, his first priority is his national ambitions," Lautenberg said on the call. "We saw it in the RNC keynote speech when it took Chris Christie 17 minutes to mention Mitt Romney's name."

Greenwald specifically noted that the fundraiser will take Christie to western Iowa, home to the first vote in the 2016 election.

"From questioning President Obama's birth certificate to vigorously defending Todd Akin, Steve King's record of outrageous, extremist views is well-established. He is an embarrassment to our country," Greenwald said in the statement. "The fact that Chris Christie is standing shoulder to shoulder with a radical right-wing zealot like Steve King shows that Christie has his eye more on Iowa's 2016 caucuses than on responsible leadership and governing."

Christie's spokesman did not immediately return an email seeking comment.

Greenwald and Wisniewski have both been mentioned as potential challengers to Christie in the 2013 gubernatorial election. Wisniewski, an assemblyman from Middlesex County, used the call to criticize Christie's defense of recently released comments about Obama supporters made by Romney during a May fundraiser in Florida.

He said that Christie and Romney should not be describing those who do not pay taxes as dependent on government. "That kind of disdain from someone from wants to be president of the United States is breath taking," Wisniewski said.

UPDATE: 6:10 p.m. -- American Bridge 21st Century, a Democratic super PAC based in Washington, joined the criticism of Christie's decision to appear at King's fundraiser. The group released a video Wednesday afternoon with footage of Christie saying he "is tired of dealing with the crazies," and several speeches by King. The King clips include the Iowa Republican calling for an electrified border fence since that is used for "livestock," and racially motivated statements about those who voted for Obama.

The American Bridge video ends with the suggestion that Christie is attending King's event to lay the groundwork for a 2016 presidential campaign.

Also on HuffPost:

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  • "It's Not My Time" (3 Doors Down)

    <strong><a href="" target="_hplink">(Oct. 4, 2011) --</a></strong> Christie announced that he will not run for the Republican presidential nomination in 2012, vowing that "now is not my time." He quipped to New Jersey residents "whether you like it or not, you're stuck with me."

  • "Need You Now" (Lady Antebellum)

    <a href="" target="_hplink"><strong>LEBANON, N.H. (Oct. 11, 2011) --</strong></a> After dismissing calls to run for president himself, Christie endorsed Romney, telling the GOP that he is the candidate we need now.

  • "How Do I Live" (LeAnn Rimes)

    <strong><a href="" target="_hplink">WEST NEW YORK, N.J. (Dec. 7, 2011) --</a></strong> At a local town hall, Christie did not take kindly to a <a href="" target="_hplink">constituent's question</a> about how his administration conducts these types of meetings. He showed the individual little mercy, going "if I plant questions, why the hell did I call on you?"

  • "Can You Feel The Love Tonight" (Elton John)

    <strong><a href="" target="_hplink">(Dec. 8, 2011) --</a></strong> Occupy Wall Street protesters interrupted Christie during an appearance in Iowa, making him a target of the movement's "mic check" trend.

  • "Shut Up" (The Black Eyed Peas)

    <strong><a href="" target="_hplink">(Feb. 21, 2012) --</a></strong> In an interview with CNN's Piers Morgan, Christie had some choice words for Warren Buffett, surrounding the billionaire investor's desire to be taxed at a higher rate. "Just write a check and shut up," he remarked.

  • "American Idiot" (Green Day)

    <strong><a href="" target="_hplink">(March 9, 2012) --</a></strong> Christie argued with a former Navy SEAL over the New Jersey's plans to reconfigure public universities. The result? Some fire from the governor's tongue, as he called the veteran an "idiot."

  • "Call Me Maybe" (Carly Rae Jepsen)

    <strong><a href="" target="_hplink">(April 13, 2012) --</a></strong> Throughout Mitt Romney's run for the White House, Christie made it known that he was open to a vice presidential nod (should Romney ask him).

  • "Rocky Ground" (Bruce Springsteen)

    <strong><a href="" target="_hplink">(April 19, 2012) --</a></strong> Christie vehemently denied reports that he was sleeping at a Bruce Springsteen concert in New York City. <em><strong>

  • "I Don't Really Care" (Waka Flocka Flame)

    <a href="" target="_hplink">(April 30, 2012) --</a> Christie responded to jokes comedian Jimmy Kimmel made about his weight at the 2012 White House Correspondents Dinner, throwing Sofia Vergara into the mix. "I figured I was in the zone of danger," he said.

  • "Ready Or Not" (The Fugees)

    <strong><a href="" target="_hplink">(Aug. 14, 2012) --</a></strong> After entertaining the idea of running for president and making Mitt Romney's short list of VP candidates, Christie was named the keynote speaker at the 2012 Republican National Convention. "I'll try to tell some very direct and hard truths to people in the country about the trouble that we're in and the fact that fixing those problems is not going to be easy for any of them," he told <em>USA Today</em>.