Speaking in Iowa with "Nuns on the Bus," Biden told a story about a recent visit to Singapore where he met with "a guy named Lee Kuan Yew, who most foreign policy experts around the world say is the wisest man in the Orient."
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On Tuesday, Biden used the controversial expression "Shylocks", which is widely considered an anti-Semitic slur, at a speech to the Legal Services Corporation.
The Anti-Defamation League condemned Biden's remarks as "offensive."
Biden subsequently apologized, admitting it was a "poor choice of words."