Lawrence: Republican 'Cowardly Lions' of the Senate will live the rest of their lives in disgrace

Tonight on The Last Word: Senate Republicans cave to Donald Trump on the Iran war vote. Also, a federal judge blocks Trump’s executive order limiting mail ballots. Plus, Democrats are linking Republicans to Trump’s affordability failures. And ​France confirms the first Ebola case outside of Africa. Sen. Chris Van Hollen, Rep. Jamie Raskin, Roy Cooper, and Nicholas Enrich join Lawrence O’Donnell.