Duncan, R-3rd District and chairman of the House Foreign Affairs Committee's Subcommittee on the Western Hemisphere, has long supported the island nation's recovery from a devastating 2010 natural disaster, but has also called for more transparency in USA aid money sent to the country.
Donald Trump ignored the stunning question at a White House appearance on Friday - "Mr. President, are you a racist?" - but there's no getting around that more people in the media are willing to use that label.
In Atlanta, at the congregation once led by King, the Rev Raphael Warnock of Ebenezer Baptist Church and other faith leaders planned a news conference to condemn Trump's "vile and racist" remarks made on the eve of the Martin Luther King Jr. holiday weekend.
Duncan is not among them. Rep. Cedric L. Richmond (D-La.), chairman of the Congressional Black Caucus, said on Twitter that Trump's remarks "are further proof that his Make America Great Again Agenda is really a Make America White Again agenda".
Duncan, who is seeking re-election in November, will face either Anderson Democrat Mary Geren or Seneca's Hosea Cleveland.
While the exams are not mandatory, modern presidents typically undergo them regularly and release a doctor's report declaring they are "fit for duty".
He said that Trump should focus on the substance of the immigration reform bill and making sure it includes funding for policies he has long advocated for, including a border wall and enhanced border security.
At that Thursday session, according to Durbin, Trump wondered why the United States did not instead try to get more Europeans, citing, for example, from Norway. "They [Republicans] don't believe in immigration - it's always been about people of color and keeping them out of this country", he added. It is a day we will never forget, a day that we should not forget.
Next Friday is the deadline for Congress to pass a national budget, something many Democrats, whose votes are needed, have said they will not do unless there is a fix for DACA. "Love conquers ALL folks: KEEP LIVING THE DREAM". Republican lawmakers introduced legislation in 2017 that would cut or eliminate some long-standing parts of the US immigration system, but none of the bills passed. Tim Scott, R-S.C., called Trump's remarks "disappointing".
Durbin, who was in the meeting with Trump, told reporters the president did say "these hate-filled things" and repeatedly called African nations "shitholes".
He said he would be on the phone Friday "begging" his colleagues in both parties to support the measure.
When it came to talk of extending protections for Haitians, Durbin said Trump replied: "We don't need more Haitians'".
"I've said all along the president many times says what people are thinking", Republican Rep Jim Renacci, a candidate for Senate in OH, told Fox News.
"You don't want to just call people names that you can't back up", he said in an interview. It's good that it's now safe to say this on prime time television, but we already knew that. Diversity was a strength, he said, not a weakness. "In reforming immigration we can not lose these American ideals".