Column: ‘Retire and go back under a rock’: Biden loyalists push back …

Just like the man they stand behind, backers of President Biden can be a feisty bunch.

Even as more prominent supporters jump ship — Hollywood high rollers George Clooney and Rob Reiner say it’s time for Biden to step aside, and former House Speaker Nancy Pelosi stopped short of saying she wants Biden to stay in the race — true Bidenistas are digging in.

There’s California Gov. Gavin…