Texas Gov. Greg Abbott has directed the state’s National Guard to block Border Patrol agents from doing their jobs, and the 5th Circuit Court of Appeals (the Trumpiest federal appeals court) cleared the way for him to do so.

Now tensions are mounting by the hour—and if violence breaks out, Mark Joseph Stern writes, the Supreme Court will share the blame. He explains how this whole saga at the border has unfolded, why the Texas Guard’s actions violate federal law, and why the high court really needs to intervene.

Judge Aileen Cannon is quietly undermining the Trump classified documents case. A new order she issued last week adds to “the mountain of evidence that she is firmly in the former president’s pocket,” Dennis Aftergut and Laurence H. Tribe write. They explain how Judge Cannon has clearly learned all the wrong lessons since........

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