Generally speaking, depicting your opponents as “crazed lunatics” and yourself as the voice of reason is easier when you are not using all caps and exclamation points. Still, in this case, Trump’s position is correct. The filibuster is a deformed anachronism. Its demise would benefit the whole country, and Democrats especially, given the bills and Senate procedures that this tactic tends to block. If Trump’s impulsive, short-horizon leadership style is what finally does the filibuster in, then Democrats should help make it so.