Comment by proberts

Those who are in YC and who previously were in YC almost always can get work authorization, whether it's an O-1, E-2, H-1B, or country-specific visa. Relatively speaking, the harder cases are those involving those who don't have at least a bachelor's degree. While lots of experience sometimes can fix this, not always, which means that an O-1 visa is usually the only option. Regarding the impact of a change in administration, I just touched on this in response to another question/comment.