Megan McArdle spent the weekend compiling responses from Republicans who can't stand the thought of Donald Trump as the nominee.
What surprised me? First, the sheer number of people who sat down and composed lengthy e-mails on a weekend.
Second, the passion they showed. These people are not quietly concerned about Trump. They are appalled, repulsed, afraid and dismayed that their party could have let this happen. They wrote in the strongest possible language, and many were adamant that they would not stay home on Election Day, but in fact would vote for Hillary Clinton in the general and perhaps leave the Republican Party for good.
And then there's the fear factor.
The main arguments were his authoritarianism, his lack of any principle besides the further aggrandizement of one Donald J. Trump, his racism and misogyny, and his erratic behavior, which led a whole lot of people to write that they were afraid to have him anywhere within a thousand miles of the nuclear launch codes.
Now Trump knows what he needs to work on between now and the convention.