Donald Trump has sued New York Attorney General Letitia James, accusing her of conducting a “war of intimidation and harassment” against him.
It follows a lawsuit that Ms James launched against Mr Trump and three of his children last September, accusing them of fraud committed over a decade.
Mr Trump, a Republican, has long accused the Democrat of abusing her position for political gain.
The former president has repeatedly denied any wrongdoing.
In the latest lawsuit – which was filed to the Florida State Circuit Court – Mr Trump accused Ms James of “a relentless, pernicious, public and unapologetic crusade” against him and the Trump Organization.