All of the following contributed to the spanish victory over the aztecs except: disease wiped out many of the aztecs.
native americans in the region resented paying tribute to the aztecs.
the spanish had horses and superior weapons.
the spanish had more soldiers.

yes, there are senators in each state

one of the main reasons was definitely slavery. back in 1861, republican abraham lincoln was elected and ended up being a major influence in the slavery business. slavery greatly affected the texas economy because back in 1845 during the annexation of texas, slaves became a big part of the texas population. many texans that were in favor of the secession influenced groups through party ties.