Which of the following describes a similarity in the effects of americans migrating to texas and to oregon during the mid-19th century? in both territories, settlers from different u. s. regions engaged in widespread conflicts over the issue of slavery. in both territories, the united states aggressively asserted american settlers' interests against european competition. in both territories, american settlers organized armed resistance movements against strong u. s. federal control. in both territories, american missionaries established influence through the mass conversion of american indians to christianity. how did the demographic makeup of texas's population drive political movements in the united states during the mid-19th century? since most settlers in texas had come from the south, abolitionist leaders opposed texas's proposed statehood. becaus