She is referring to Trump's proposal to use a former Japanese internment camp during WWII to house immigrants.
Trump administration to send migrant children to Army base once used as Japanese internment camp
Trump administration to send migrant children to Army base once used as Japanese internment camp
Some immigrant children detained at the southern border will be sent to a U.S. Army base once used to intern Japanese-Americans during World War II as authorities seek new shelters to house an overflow of people crossing the border.
The Health and Human Services Department (HHS), which operates the Office of Refugee Resettlement, said it was activating facilities at Fort Sill Army Base near Lawton, Okla., as a temporary emergency shelter for children detained at the border.
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I think the Democratic response to doing this was overdone since Obama used this camp for a short time. But Japanese-Americans whose ancestors were interned there are upset about seeing this practice occur again.