In a concurring opinion in a dispute unrelated to birthright citizenship, Ho, a 2018 Trump appointee on the federal appellate court covering Texas, Louisiana and Mississippi, was receptive to arguments that illegal immigration at the Texas border could constitute an “invasion.” That language could evoke an exception to the established 14th Amendment interpretation, for children of invading armies.

Judge Ho has often reinforced emerging conservative theories. Before joining the bench, however, he wrote an essay directly addressing birthright citizenship and said the 14th Amendment and Wong Kim Ark case protected children of undocumented immigrants.

“All three branches of our government – Congress, the courts, and the Executive Branch – agree that the Citizenship Clause applies to the children of aliens and citizens alike,” he said in a 2006 essay in The Green Bag.

Ho concluded with a warning if a move were made to withdraw birthright citizenship: “Stay tuned: Dred Scott II could be coming soon to a federal court near you.”

Chief Justice Roberts received no questions about the Wong Kim Ark case during his 2005 Senate confirmation hearings. But Dred Scott was raised, and Roberts responded by calling it, “perhaps the most egregious examples of judicial activism in our history … in which the Court went far beyond what was necessary to decide the case.”

“And really, I think historians would say that the Supreme Court tried to put itself in the position of resolving the dispute about the extension of slavery, and resolving it in a particular way that it thought was best for the Nation,” he added. “And we saw what disastrous consequences flowed from that.”

Since then, Roberts has also alluded to Dred Scott in terms of his own legacy.

“You wonder if you’re going to be John Marshall or you’re going to be Roger Taney,” he said in 2010, contrasting the great 19th century chief justice with the chief justice who wrote Dred Scott.

“The answer is, of course, you are certainly not going to be John Marshall,” Roberts said. “But you want to avoid the danger of being Roger Taney.”