The USA had a population of about 5.3 million people in the year 1800. So WI a large immigration rush happened to the USA so that by the end of the war it's population would be twice or thrice that number ( most immigrants would be German, or Scandinavian and Protestant) how would this effect the USAs policy especially toward the Mexicans and Brits if they have a larger population in the near future and what happens to slavery and industrialisation if there is more cheap labour available. Could we also see a US that's more diverse when it comes to languages.