Supreme Court Justice Elena Kagan grilled U.S. Solicitor General John Sauer on the practicalities of ending universal injunctions on Thursday, a major sticking point in a highly watched case centered on birthright citizenship and the power of lower courts to rule against the executive branch. 

Kagan pressed Sauer on Thursday on ending universal injunctions and how the higher court should then be tasked with managing the flow of lower court challenges. 

She also noted that the Trump administration has been "losing uniformly" in lower court cases on the "substantive question" in dealing with birthright citizenship.

SUPREME COURT TAKES ON BIRTHRIGHT CITIZENSHIP: LIBERALS BALK AT TRUMP ARGUMENT TO END NATIONWIDE INJUNCTIONS

Elena Kagan

Supreme Court Justice Elena Kagan participates in a discussion at the George Washington University Law School in Washington, D.C., on Sept. 13, 2016. (Mark Wilson/Getty Images)

"If I were in your shoes, there's no way I'd approach the court with this case!" Kagan quipped.

After he attempted to answer, she responded, "This is not a hypothetical — this is happening out there.

John Sauer

John Sauer, then-nominee to be solicitor general, testifies during his Senate confirmation hearing on Feb. 26. (Tom Williams/CQ-Roll Call, Inc via Getty Images)

"Every court is ruling against you."

Justices on the high court agreed in April to hear the case, which centers on three lower courts that issued national injunctions earlier this year blocking President Donald Trump's executive order on birthright citizenship. 

President Donald Trump signs executive order

President Donald Trump signs an executive order n the Rose Garden of the White House in Washington, D.C., on April 2. (Saul Loeb/AFP via Getty Images)

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The order reinterprets the 14th Amendment to deny automatic U.S. citizenship to children born in the U.S. if their mother is unlawfully present or temporarily in the country, and if their father is neither a U.S. citizen nor a lawful permanent resident at the time of birth. Trump's action remains on hold nationwide pending Supreme Court intervention. 

A Supreme Court decision here could have sweeping national implications, setting a precedent that would affect the more than 310 federal lawsuits that have challenged White House actions since Trump's second presidency began on Jan. 20, according to a Fox News data analysis.