Is a DUI a felony?

Based on the provided context, a DUI can be classified as a felony in certain circumstances. Specifically, in the case of Sigala v. Campbell, Isidro Huerta Sígala pleaded nolo contendere to a count of felony driving under the influence in California state court, which resulted in a significant sentence under California’s Three Strikes law ^[3]. However, the context does not provide a comprehensive overview of DUI laws across all states or the specific criteria that determine whether a DUI is a felony in different jurisdictions. Therefore, while it is supported that a DUI can be a felony in some cases, the sources do not cover the full scope of this issue.