What does Texas have to do with Manifest Destiny and how is Texas “American” according to O’Sullivan?

1. What does Texas have to do with Manifest Destiny and how is Texas “American” according to O’Sullivan?  Who can be an American and why How is “freedom” or “liberty” defined by O’Sullivan?

2. What are some of the ways that Fitzhugh defends the institution of slavery? How does the abolitionist Frederick Douglass respond? What is “America” according to Douglass?