Lawrence: Trump's Iran war propaganda videos show the depths of his depravity

Tonight on The Last Word: Iran’s new leader vows to keep the Strait of Hormuz closed. Also, Donald Trump suggests high oil prices are a positive. Plus, the DHS shutdown strains TSA staffing at airports nationwide. And the Senate passes a bipartisan housing affordability bill. Sen. Gary Peters, Rep. Brendan Boyle, and Sen. Adam Schiff join Lawrence O’Donnell.