The court said in a statement that the 87-year-old Ginsburg underwent a minimally invasive procedure to ``revise a bile duct stent'' at Memorial Sloan Kettering Cancer Center.

The 87-year-old, who indicated she has no plans to retire, said her treatment so far has succeeded in reducing lesions on her liver and that she will continue chemotherapy sessions every two weeks.

By 7-2 votes, the justices upheld the Manhattan district attorney's demand for Trump's tax returns, but kept a hold on Trump's financial records that Congress has been seeking for more than a year.

The high-stakes dispute, which could be resolved Thursday, tests the balance of power between the White House and Congress, as well as Trump’s claim that he can’t be investigated while he holds office.

The justices will determine if such so-called faithless electors have the discretion to cast Electoral College votes as they see fit or whether states can impose restrictions including with penalties.

The justices are poised to issue decisions in June, amid Trump's bid for a second term.

The justices did not comment in refusing to review an appeals court ruling that upheld the law.

The filing Thursday sets the stage for a high court showdown over the tax returns Trump has refused to release, unlike every other modern president.

The justices will examine a Louisiana law requiring doctors who perform abortions to have admitting privileges at a nearby hospital.

The 86-year old U.S. Supreme Court justice, who has had previous cancer scares, tolerated the therapy well and no further treatment is required, a spokesperson said.