Wilton, Connecticut: Donald Trump’s election campaign is calling for donations from 1 million of his backers, warning he could lose his New York properties, after the former US president failed to secure a bond to cover a $US454 million ($686 million) judgment in a civil fraud case.

“KEEP YOUR FILTHY HANDS OFF OF TRUMP TOWER!,” reads a message to supporters from a joint fundraising committee that allocates the money it collects to his campaign and a separate political committee that has been paying Trump’s legal bills.

The civil fraud case, brought by New York state Attorney-General Letitia James in September 2022, is one of several legal cases Trump faces ahead of the November 5 election rematch with Democratic President Joe Biden.

The message, sent by text with prompts for supporters to donate in amounts ranging from $US20.24 to $US3300 or a specific amount, accuses James of wanting to seize Trump’s properties and portrays her actions as part of a broader effort by Biden and Democrats to harm his reelection campaign.

“So before the day is over, I’m calling on ONE MILLION Pro-Trump patriots to chip in and say: STOP THE WITCH HUNT AGAINST PRESIDENT TRUMP!” the campaign message said.

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Biden has said he is not involved in any of the cases against Trump. The Biden campaign declined to comment.

The fundraising message links donors to the joint fundraising committee to which Trump typically asks supporters to contribute. It alludes to James’ case, but it does not say that funds would be used for that purpose.

It is unclear if Trump could use the funds to pay for the judgment. While federal law prohibits the use of campaign money for personal expenses, Trump has been able to use donor money to pay some of his lawyers’ fees, saying his legal defence is campaign-related.