In regards to your question as to whether you can practice law in every jurisdiction, I'm starting to see that some jurisdiction are either silent, or prohibit

In regards to your question as to whether you can practice law in every jurisdiction, I'm starting to see that some jurisdiction are either silent, or prohibit someone with a foreign law degree + LLM to sit for their bar exam. But if you include the ability of reciprocity after admission to the Texas state bar, it opens up a lot of doors.