The ruling was a blow to both President Trump, who had voluntarily dismissed the suit last week, and to the Justice Department, which used the suit to establish a fund likely intended for Trump allies.
In a stern order on Friday, a judge said that she wanted to investigate the circumstances surrounding President Trump’s efforts to settle the lawsuit in a way that benefited him and his allies.
The Trump administration is creating a $1.8 billion fund to compensate people it says were wronged by the federal government, a group that could be largely made up of the president’s allies.
By issuing a prohibition on federal investigations that might threaten Trump’s finances, the Justice Department has placed the president and his family in a new category.
Readers respond to news that the I.R.S. would be barred from pursuing tax claims against President Trump, his family or his businesses. Also: Protecting precious places; growing native plants.