From security around Mar-a-Lago to road closures and traffic gridlock, Palm Beach underwent a transformation within a week of the July 2024, incident.

The learning curve for how to navigate the political spotlight has been more than a bit steep for second lady Usha Vance, resulting in many an awkward moment.

Mr. Miller’s demands, however, went unmet. That’s because he was issuing them back in 2017, and the homeland security ...