Will the Supreme Court jeopardize the prosecution of more than 350 defendants involved with Jan. 6, including Donald Trump, by gutting the federal statute that prohibits their unlawful conduct? Maybe so. Tuesday’s oral arguments in Fischer v. United States were rough sledding for the government, as the conservative justices lined up to thwap Joe Biden’s Department of Justice for allegedly overreaching in its pursuit of Jan. 6 convictions. Six members of the court took turns wringing their hands over the application of a criminal obstruction law to the rioters, fretting that they faced overly harsh penalties for participating in the violent attack. Unmentioned but lurking in the background was Trump himself, who can wriggle out of two major charges against him with a favorable decision in this case.

There are, no doubt, too many criminal laws whose vague wording gives prosecutors near-limitless leeway to threaten citizens with decades in prison. But this isn’t one of them. Congress wrote a perfectly legible law and the overwhelming majority of judges have had no trouble applying it. It would be all too telling if the Supreme Court decides to pretend the statute is somehow too sweeping or jumbled to use as a tool of accountability for Jan. 6.

Start with the obstruction law itself, known as Section 1552(c), which Congress enacted to close loopholes that Enron exploited to impede probes into its misconduct. The provision is remarkably straightforward—a far cry from the ambiguous, sloppy, or muddled laws that typically flummox the judiciary. It’s a mainstay of the Department of Justice’s “Capitol siege” prosecutions, deployed in about a quarter of all cases. Overall, 350 people face charges under this statute, Trump among them, and the DOJ has used it to secure the convictions of about 150 rioters. It targets anyone who “corruptly … obstructs, influences, or impedes any official proceeding, or attempts to do so.” And it clarifies that an official proceeding includes “a proceeding before the Congress.”

The government argues that some rioters attempted to “obstruct” an “official proceeding” by halting the count of electoral votes through “corrupt” means. That includes Joseph Fischer, the defendant in the current case. Fischer, who served as a police officer before Jan. 6, allegedly texted that the protest “might get violent”; that “they should storm the capital and drag all the democrates [sic] into the street and have a mob trial”; and that protesters should “take democratic congress to the gallows,” because they “can’t vote if they can’t breathe..lol.” Video evidence shows Fischer........

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