Jill Biden, in message to supporters, calls out special counsel's mention of Beau Biden's death

First lady Jill Biden on Saturday offered her first public defense of President Joe Biden's age and mental acuity since special counsel Robert Hur detailed what Hur said were notable lapses in the president's memory, spurring more scrutiny of his age and stamina.

In a fundraising appeal to supporters, Jill Biden slammed Hur's report, released on Thursday, as «inaccurate and personal political attacks,» focusing on Hur's assertion that Joe Biden could not remember «within several years» when his son Beau died.

Although Hur's report said Joe Biden «willfully retained» classified documents while out office — which the president disputes — Hur could not recommend bringing charges because, he wrote, the «evidence does not establish Mr. Biden's guilt beyond a reasonable doubt.»

«At trial, Mr. Biden would likely present himself to a jury, as he did during our interview of him, as a sympathetic, well-meaning, elderly man with a poor memory,» Hur wrote.

Jill Biden fired back this weekend.

«Believe me, like anyone who has lost a child, Beau and his death never leave him,» she wrote in the donor email. «I hope you can imagine how it felt to read that attack — not just as Joe's wife, but as Beau's mother.»

Like Joe Biden has, Jill Biden also invoked potential partisanship. Joe Biden called Hur a «Republican counsel,» alluding to his background as a U.S. attorney in the Trump administration. (A spokesperson for Hur previously declined to comment to ABC News on the president reacting to the report.)

«We should give everyone grace, and I can't imagine someone would try to use our son's death to score political points,» Jill Biden wrote in the email on Saturday. «If you've experienced a loss like that, you know that you don't measure it in