New Western Lands The territories of Texas, New Mexico, and (6)___ renewed the dispute over the issue of slavery. The annexation of (7)___ became the main issue in the presidential election of 1844. During the Mexican War, the (8)___ was proposed in Congress. It specified that slavery should be prohibited in any lands acquired from (9)___. Senator (10)___ countered, proposing the neither Congress nor a territorial government had the authority to ban (11)___. The (12)___ Party was formed when neither presidential candidate in 1848 would take a stand on slavery. The possibility of new statesentering the Union renewed the Southern con- cern over the balance of power in the (13)___.