I had occasion to point out yesterday (An Independent Judiciary?) that President Trump's (and Mitch McConnell's) strategy of concentrating on confirming appellate level federal judges is paying dividends. Not all is smooth sailing, of course. The 9th Circuit can still be a problem (as recently in a 2A case), but it's still far better than when Trump took office. A couple of cases on this relatively slow news day (so far) illustrate the impact Trump's appellate judges are having.
Since I mentioned the 2A just now, a case from New Jersey is a good place to start. Defense Distributed is a TX company that distributes various 3d print files for firearms and firearm accessories. New Jersey's Attorney General, Gurbir Grewal, sent Defense Distributed letters in TX attempting to restrain Defense Distributed from doing its business in NJ and threatening to prosecute Defense Distributed. The federal district court in TX agreed with Grewal that those letters were insufficient to provide the TX court with jurisdiction in the case. However, the Fifth Circuit disagreed. The SCOTUS has now--by declining Grewal's petition for certiorari--agreed with the Fifth Circuit.
The practical effect of this jurisdictional decision is that NJ will now have to justify its conduct to an unsympathetic federal court in TX. The Truth About Guns points out that the Fifth Circuit
has already made it clear that it believes that governmental efforts to restrict Defense Distributed’s distribution of 3D files have very serious if not fatal First Amendment implications.
This complicates anti-gun matters for crusading officials in anti-2A states. The SCOTUS undoubtedly knew this.
There's more good news from the 6th Circuit (which includes Ohio). You can read a longer account here: