USA Today’s editorial board issued a sharp rebuke of President Trump’s attacks on Democratic Sen. Kirsten Gillibrand in which he said she “would do anything” for campaign donations.

“A president who would all but call Sen. Kirsten Gillibrand a whore is not fit to clean the toilets in the Barack Obama Presidential Library or to shine the shoes of George W. Bush,” the paper’s editorial board wrote late Tuesday.

The paper said Trump hit “a new low” with his tweet Tuesday morning saying Gillibrand “would come to my office ‘begging’ for campaign contributions not so long ago (and would do anything for them).”

Such an attack makes Trump unfit for office, the editorial board wrote.

“With his latest tweet, clearly implying that a United States senator would trade sexual favors for campaign cash, President Trump has shown he is not fit for office. Rock bottom is no impediment for a president who can always find room for a new low,” the editorial said.

Obama and Bush both “broke promises and told untruths,” the paper wrote, “but the basic decency of each man was never in doubt.”

“Donald Trump, the man, on the other hand, is uniquely awful. His sickening behavior is corrosive to the enterprise of a shared governance based on common values and the consent of the governed,” the editorial continued, warning that the “awfulness” of the Trump era will get much worse.