They said he was unstable. They said he was dangerous. Well, that narrative that the liberal media has been crafting for weeks was torpedoed in about 90 minutes last night when President Donald J. Trump delivered his State of the Union address. Liberals were already going apoplectic over it, with more than a few suggesting that no matter what he says—it’s not presidential. Amid the tantrum came one of the most appalling displays by an opposing party in recent memory. Democrats sat there, silent, fuming, and still sour over the fact that Hillary Rodham Clinton would a) never become president;...