Supreme Court Justice Ketanji Brown Jackson took aim at her colleagues Monday with a blistering rebuke of what she labeled as their “unusual” move, one that she claimed had been done no more than three times in the last quarter century, The Washington Post reported Tuesday.

Jackson was referring to the Supreme Court’s landmark ruling in late April when it voted to effectively gut a provision of the Voting Rights Act designed to prohibit racially discriminatory voting policies. The court was deciding on a matter related to Louisiana's congressional district map, with Republicans having challenged a lower court’s order requiring state lawmakers to create a second majority-Black district.

Supreme Court justices Ketanji Brown Jackson and Brett Kavanaugh sparred publicly on Monday over how the court has repeatedly stepped in to aid policies pushed by President Donald Trump.

The rare exchange occurred during a joint appearance at a federal courthouse event in Washington, D.C., where the two justices discussed the court’s growing use of emergency rulings – often referred to as the “shadow docket,” according to NBC News.

Liberal Supreme Court Justice Ketanji Brown Jackson warned last summer that her conservative colleagues on the bench were doing irreparable harm to the court’s image as they increasingly sided with the rich and powerful, and a new study published Monday appeared to validate those fears.

Published by the National Bureau of Economic Research, the study found that since the 1950s, conservative Supreme Court justices increasingly issued rulings that favored the wealthy when compared to their liberal counterparts.

In a 6-3 decision in Blanche v. Lau, the Supreme Court's conservative majority sided with the Trump administration, ruling border officials can revoke green cards from returning residents based on suspicion of criminal activity without requiring evidence.

The Independent reports Justice Ketanji Brown Jackson criticized her conservative colleagues for betraying existing green card holders.

After yet another 6-3 Supreme Court ruling that handed Donald Trump’s administration one more victory, Justice Ketanji Brown Jackson called out her conservative colleagues over their betrayal of existing green card holders.

According to The Independent, the ruling came down in Blanche v. Lau, which agrees with the administration that, if a green card holder leaves the U.S. and then returns, a border official can arbitrarily declare they may have committed a possible crime and therefore can revoke and confiscate their green card without evidence, putting them in a "legal limbo."

The case centered on Muk Choi Lau, a lawful permanent resident who returned from a short trip to China in 2012. A border officer placed him on immigration parole after he was accused of counterfeiting crimes. Lau later pleaded guilty to selling counterfeit clothes in New Jersey, but argued the officer had overstepped authority in triggering deportation proceedings, the report notes.

The conservative majority Supreme Court disagreed, with Thomas reasoning that, "Border officers did not have the burden to establish by clear and convincing evidence that Lau had committed a crime involving moral turpitude."

Jackson, joined by Justices Sonia Sotomayor and Elena Kagan, unleashed a fierce counterattack, writing that the majority's ruling "cavalierly swept aside" the rights of green card holders and handed the government a "massive blank check" to rewrite immigration law as it sees fit at the moment.

The decision allows the government to upend a green card holder's status upon return to the U.S. "so long as the government is able to show later that he was eventually convicted," Jackson noted— calling it an astonishing reversal of the "burden of proof" standard.

"That sequencing undermines the plain terms and basic operation of the relevant statutory scheme, which guarantees that lawful permanent residents will not be 'regarded as seeking an admission' at the border unless certain exceptions apply," she added.