With the midterms fast approaching, Hillary Clinton has written a scathing critique of President Trump that accused him of disregarding the law and weakening the social fabric of the country, imploring voters to “do everything we can to fight back” and “mobilize massive turnout” in November.

When Mr. Trump prevailed over Mrs. Clinton in the 2016 election, she had told her supporters that they owed him “an open mind and the chance to lead,” she recalled in the essay, which was posted by The Atlantic on Sunday.

“I hoped that my fears for our future were overblown,” she wrote. “They were not.”

“And right now, our democracy is in crisis,” she added, saying she does not use the word “crisis” lightly.

The essay was adapted from the new afterword in the paperback edition of her 2017 memoir, “What Happened,” which is being released on Tuesday. In the piece, she listed “despicable things” inflicted by the president “and his cronies” and ticked off five “main fronts” to what she calls the “assault on our democracy.”