Lawrence: Trump boasts about passing the one test you're never supposed to boast about passing

Tonight on The Last Word: Donald Trump cancels a red state rally in the final days before Election Day. Also, ADA champion Tom Harkin backs Josh Turek for his former Senate seat. And Trump’s tariffs and Iran war are devastating Nevada’s economy. Adam Hamilton, Iowa State Rep. Josh Turek, fmr. Sen. Tom Harkin, and Nevada Attorney General Aaron Ford join Lawrence O’Donnell.