Rep. Tom MacArthur Thomas (Tom) Charles MacArthurRepublican David Richter wins NJ primary in race to challenge Rep. Andy Kim What to watch in New Jersey's primaries on Tuesday Republicans plot comeback in New Jersey MORE (R-N.J.) responded to Rep. Adam Schiff Adam Bennett SchiffSchiff claims DHS is blocking whistleblower's access to records before testimony GOP lawmakers distance themselves from Trump comments on transfer of power Rubio on peaceful transfer of power: 'We will have a legitimate & fair election' MORE's (D-Ca.) implication that he was racist against Koreans on Thursday, asking him to apologize to his two children adopted from South Korea.

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In his tweet, MacArthur denied having said that his Korean American midterm opponent "is not one of us" and pointed out that he adopted Korean children who deserved an apology from Schiff.

Hey @AdamSchiff - First, I didn't say that. Second, you should have done some research before you made such a disgustingly false claim. I have 2 adopted children from South Korea. I don't want your apology, but you sure can apologize to my children. pic.twitter.com/o5TDFq4a7o — Tom MacArthur (@tmac4congress) October 18, 2018

Schiff's criticism of MacArthur was part of a broader tweet earlier Thursday arguing that Republican candidates put away "the dog whistles of bigotry" and have started "using trumpets."

Rep. MacArthur says his Korean American opponent is “not one of us.” Rep. Hunter attacks his challenger for being a Muslim terrorist. And Rep. King endorses an avowed white supremacist and anti-Semite.



The dog whistles of bigotry have been put away.



Now they’re using trumpets. — Adam Schiff (@AdamSchiff) October 18, 2018

If Andy Kim (D) defeats MacArthur in the midterms, he would become the first Korean American to serve in Congress since 1999.

Cook Political Report, an independent election handicapper, rates the race as a 'toss up.'