This needs context.

Twenty-two days into the longest government shutdown ever, President Trump continued to press his case for a border wall. His tweet on Saturday was crammed with statistics that were either exaggerated or omitted important context.

Immigrant prison population

Mr. Trump’s figure for the percentage of unauthorized immigrants in federal prisons is exaggerated.

Out of the Bureau of Prisons’ total inmate population of 183,058 in the first quarter of the 2018 fiscal year, 21 percent were immigrants, both legal and undocumented, according to a government report. At least 13 percent of the total population, or 23,826 inmates, were in the country unlawfully. The immigration status of another 11,698 inmates was under investigation, while 2,608 inmates were lawful immigrants or had received relief from deportation.

The most common crimes committed by these immigrants were drug-related offenses (46 percent) and immigration offenses (29 percent).