US talk show host Oprah Winfrey took a swipe at Republican vice presidential candidate JD Vance during a surprise speech at the Democratic Party Convention in Chicago on Wednesday, addressing Vance’s controversial remarks about childless women. Vance had previously made derogatory comments about childless women, referring to them as “childless cat ladies.” Winfrey addressed this by emphasizing that Americans are more united than some people might think. “When a house is on fire, we don’t ask about the homeowner’s race or religion. We don’t wonder who their partner is or how they voted,” she sa…