Speaking to a modest crowd of voters inside a Canton brewery on Tuesday evening, Mallory McMorrow, a leading candidate for Senate in the swing state of Michigan, made an anti-war appeal as President Donald Trump’s threats to kill “a whole civilization” hung over Iran and the world. “This is a moment for people to stand up and to decide who they are actually for — are they for the Constitution, are they for Americans, are they for Michiganders, or are they for Donald Trump?” McMorrow said to applause. She encouraged Democrats to consider invoking the 25th Amendment as an option...