A YEAR AGO John Sauer, then Donald Trump’s personal lawyer, persuaded six justices to hand the presidential candidate sweeping immunity from criminal prosecution. On June 27th Mr Sauer, now Mr Trump’s solicitor general, notched another huge victory for his boss—one that will enhance the power of future presidents, too. Whereas Trump v United States articulated a capacious standard of presidential immunity and cleared the way for Mr Trump to complete his campaign free of legal jeopardy, Trump v CASA liberates him from nationwide injunctions—the most potent tool judges have been using to thwart his agenda. It was, as Mr Trump wrote on social media, a “GIANT WIN”.