OK, some reactions to the oral argument:
1. First, some comments on the advocates, who all did well. Janai Nelson from NAACP was very clear and responsive, but occasionally had a tendency to couch things in policy rather than legal rhetoric. (Also, perhaps intentionally but a little surprisingly, she avoided the constitutional question the court had actually asked for reargument on.) The SG from LA was good, but a little too flippant. The plaintiffs' attorney was likewise making rhetorical arguments that weren't going to carry the day. Mooppan, the principal deputy SG for the US, was outstanding as you might expect.
2. It was an interesting argument in that the court frankly seemed least interested in what the actual parties had to say, and most interested in what the US-SG had to say. It was not a 'hot bench' from the conservative side (perhaps except Alito who did his usual thing a little bit), though the 3 liberal justices got a little exasperated at times. That's probably not a good sign for the AA plaintiffs from the original lawsuit who were defending the second MM district.
3. A good chunk of the argument focused on whether a state has a compelling interest to act on the basis of race (by creating a MM district) based on the PI and threat of a judicial map in the first case. Justice Thomas seemed to be pushing the theme (frankly similar to a lot of the other emergency docket cases that have been popping up) that a PI is ultimately preliminary and doesn't reflect final judicial findings, and thus the state's interest isn't compelling. I doubt that gets a lot of traction from other than maybe Alito.
4. There was a lot of focus on the nature of VRA2. The liberal justices emphasized (correctly, I think) that it doesn't require intentional discrimination or historic discrimination, but rather is simply a mechanism for continuously evaluating whether existing maps may inhibit voting on the basis of race, whether intentionally or not.
5. Where the real meat of things ended up though was, even assuming a potential inhibition is identified without regard to intent, when can a state or a court use a race-based remedy like a MM district to address it (and just when does race 'predominate' so that you should view it as a race-based remedy). The state and the SG were essentially arguing that it's only available when you start bringing intent back into things, given the 15th amendment. (For example, the US-SG was arguing that you'd need something suggesting, for example, that white democrats would not vote for black democratic candidates in primaries. And here, the G cited to the idea that the legislature was clearly responding to the threat of a judicial map by the first judge) The NAACP's best argument, I think, was that MM remedial authority is long standing, and given the decennial redistricting process, of limited duration.
6. There seemed to be general consensus that a state has some latitude to gerrymander for partisan purposes, like protecting incumbents. But It seems to me there is a terrible paradox here. Simply stated, there is no other demographic group whose voting patterns correlate to a particular party to anywhere near the degree of correlation between AAs and democratic voting. Thus, it becomes hard to untangle whether politics or race is the driver, and as long as that voting correlation continues, it's hard to see any end to VRA litigation. Indeed, I suspect one of the reasons you don't see VRA2 cases for other minority groups is that they simply don't have the political coherence to make it worth it for someone to pursue.
7. Mooppan noted an interesting stat late in the argument - of the 60 or so congress members who identify as AA, only about 15 of them come from MM districts.
8. I suspect we are going to see a decision where the ability to employ race based remedies like MM districts in VRA2 situations is going to be limited. CT, SA, NG certainly supported that, BK is clearly concerned about the evergreen aspects of this stuff. The chief and Barrett were a little harder to read but seemed like leans toward doing something, particularly given the real conundrum LA has been in getting sued from both sides.
9. Finally, a personal observation. Regardless of what one thinks of his opinions, I'm extremely impressed by the way BK conducts himself at oral arguments - perhaps better than any other justice except maybe the chief and barrett. He is respectful, he does not engage in 'primrose path' arguments with the advocates, he doesn't interrupt, and he spends a lot of time just making sure he really understands the parties' positions.