Lawrence: Trump’s Treasury Secretary said ‘we don’t know when’ Trump’s war will end.

Tonight on The Last Word: The USS Lincoln begins its journey home after a record deployment. Also, Democrats are investigating Jared Kushner’s Middle East business ties. Plus, the Trump Justice Department was warned of the Reflecting Pool’s peeling liner in June. And the data center debate hits the Wisconsin governor’s race. Rep. Jason Crow, Rep. Robert Garcia, Andrew Weissmann, and David Crowley join Lawrence O’Donnell.