This article used the term “mobilization of core supporters” as if it were an easily understood term by most readers. Actually this “mobilization” is fairly complicated. Many Medium readers do not seem to understand the difference between hard support and soft support — and how political parties manage them.
The impeachment process — give that the Senate was always likely to acquit — was never about the removal of Mr. Trump from office. It was about shoring up the soft support of D voters. These voters just might not bother going to the polls if the D’s did not use their constitutional tools to try to harass Mr. Trump.