A 2018 poll found that only 13% of Los Angeles residents supported the idea of secession from California. There are several reasons why support for secession is so low. First, Los Angeles is a diverse city with a large immigrant population. Many immigrants come to Los Angeles because it is part of the United States, and they would not want to see the city leave the country. Second, Los Angeles has a strong economy that is closely tied to the rest of California. Secession would disrupt these economic ties and could harm the city's economy. Third, Los Angeles is home to many important cultural institutions, such as the Getty Center and the Los Angeles Philharmonic. These institutions are part of what makes Los Angeles a great place to live, and residents would not want to see them leave the city.
There are also many legal and practical obstacles to secession. For example, the California Constitution requires that any city that secedes from the state must have the approval of the state legislature and the governor. It is unlikely that the state legislature and governor would approve a secession movement, as it would mean losing a significant amount of tax revenue and political power. Additionally, there are many practical challenges that would need to be addressed if Los Angeles seceded from California, such as how to divide the state's assets and debts, and how to ensure that residents of Los Angeles would still have access to essential services such as education and healthcare.
In conclusion, it is unlikely that Los Angeles will break away from California. There is no strong public support for such a move and there are many legal and practical obstacles that would make it difficult to achieve.