U.S. Rep. Joe Walsh (R-Ill.) on Monday urged his Democratic challenger Tammy Duckworth to pull a new ad attacking the congressman over $117,00 in back child support the Tea Party-affiliated congressman's ex-wife alleged he owed in a now-settled lawsuit.

Walsh called the new ad (embedded above) "absolutely dirty," the Chicago Tribune reports.

"My call is to have some class, Tammy. Have some grace and pull these ads which are hurtful to my kids," the Illinois congressman told the Tribune.

In a Monday press release, Walsh went on say the Duckworth ad represents "Chicago machine politics at its worse, but it is what is expected from a Blago protege like Ms. Duckworth."

Walsh's child support dispute with his ex-wife has also been the subject of at least one of the Duckworth campaign's direct mail pieces in the heated, increasingly negative 8th District congressional race, according to the Capitol Fax blog.

In April, Walsh arrived at a settlement with ex-wife Laura Walsh. A Cook County judge dismissed the complaint which alleged the congressman loaned his own campaign $35,000 and took vacations abroad while claiming that he couldn't afford to pay the child support payments.

Per the settlement, the two parties agreed that "Joe is not and was not a deadbeat dad and does not owe child support."

Last week, Walsh grabbed national headlines when he told reporters there should be no abortion exception for the "life of the mother" because "with modern technology and science, you can't find one instance" where it is needed.

After medical experts slammed the congressman's claim, Walsh attempted to clarify the incendiary claim in a press conference Friday when he admitted that, in some circumstances, an abortion is necessary to safe the life of the mother.

In response to the firestorm, Duckworth reiterated in a statement Monday that Walsh's comments on abortion were "dangerous" and "irresponsible."

While previous polling on the race has rendered wildly conflicting results, an Anzalone Liszt Research poll released Friday reported that Walsh is decisively trailing Duckworth 39 percent to 54 percent among likely voters. The poll was commissioned by the League of Conservation Voters.

Hat tip to the Capitol Fax on the Duckworth ad clip.

Earlier on HuffPost:

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  • Obama 'really isn't smart enough' to know what a tyrant is

    At a June 16 town hall event in Elmhurst, Ill., Walsh <a href="http://www.huffingtonpost.com/2012/06/20/joe-walsh-obama-immigration-policy-change_n_1612997.html" target="_hplink">called</a> President Barack Obama a "tyrant" for announcing an immigration policy change that allows some young undocumented immigrants to stay in the country. Walsh then corrected himself, saying Obama "really isn't smart enough to know what that means."

  • Democrats want 'African-Americans dependent on government'

    Walsh <a href="http://www.huffingtonpost.com/2012/05/30/joe-walsh-hispanics-african-americans_n_1557480.html" target="_hplink">accused</a> minority groups of being dependent on the federal government during a late April speech in Schaumburg, Ill. Walsh told constituents that Democrats "want Hispanics to be dependent on government just like they got African-Americans dependent on government. That's their game."

  • On Democratic opponent's military service

    In a March interview with Politico's Dave Catanese, Walsh <a href="http://www.politico.com/news/stories/0312/74625.html" target="_hplink">brushed off</a> Democratic opponent Tammy Duckworth's military service. "I have so much respect for what she did in the fact that she sacrificed her body for this country," Walsh said of the double-amputee veteran of the Iraq War. "Ehhh. Now let's move on."

  • Obama elected because he 'was black, he was historic'

    In a May 2011 interview with Slate's Dave Weigel, Walsh <a href="http://www.slate.com/articles/news_and_politics/politics/2011/05/what_did_he_just_say.2.html" target="_hplink">said</a> President Barack Obama was elected because of his race. "Why was he elected? Again, it comes back to who he was. He was black, he was historic," Walsh told Weigel.

  • 'I don't care about the loss of public sector jobs'

    When a constituent asked Walsh he supported saving post office jobs, he <a href="http://thinkprogress.org/special/2011/11/10/365890/walsh-insults-post-office-worker/" target="_hplink">shot back</a>, "I don't care about the loss of public sector jobs," according to the constituent's account. His remarks came at the end of a heated town hall event in Gurnee, Ill., where Walsh <a href="http://thinkprogress.org/economy/2011/11/08/364180/joe-walsh-melts-down-bank-lobby/" target="_hplink">interrupted</a> constituents discussing bank lobbyists in Congress. "Don't blame banks, and don't blame the marketplace for the mess we're in right now!" Walsh shouted at attendees. "I am tired of hearing that crap! This pisses me off!"

  • 'The country voted for' Obama because of his race

    Walsh <a href="http://thinkprogress.org/election/2012/04/30/473743/joe-walsh-obama-black/" target="_hplink">rehashed</a> his previous claims that Barack Obama was elected president because of his race during an April town hall event in Illinois. "He's our first African-American president," Walsh told constituents. "The country voted for him because of that."

  • Double-amputee Democratic opponent not a 'true hero'

    Walsh <a href="http://www.huffingtonpost.com/2012/07/03/joe-walsh-tammy-duckworth_n_1646793.html" target="_hplink">criticized</a> Democratic opponent Tammy Duckworth -- a double-amputee veteran of the Iraq War -- for making her military service central to her campaign and thus not being a "true hero." "Now I'm running against a woman who, my God, that's all she talks about," Walsh told constituents at a town hall event in Elk Grove, Ill., on Sunday. "Our true heroes, it's the last thing in the world they talk about."