Catherine Rampell: The far left is taking a page from its opponents’ playbook

The leftward drift of the 2020 Democratic presidential candidates seems to reflect a common frustration within the party’s base: Democrats have simply never dreamed big enough.Perhaps, lefties suspect, Democratic politicians have been cowed by bad-faith accusations of socialism. Or — worse — they’ve been captured by big-money special interests.Implicitly or explicitly, a slate of recent books and essays suggests that this was a core failing of the Obama administration, Hi