At first , the subject of annexing Texas to the United States was shunned by both major American political parties .
Texans , mostly white immigrants from the Deep South , many of whom owned slaves , sought to bring their republic into the Union as a state .
At first , the subject of annexing immigrants to the United States was shunned by both major American political parties .
Texans , mostly white immigrants from the Deep South , many of whom owned slaves , sought to bring their republic into the Union as a state .