Tyler tried to form a new political party, but needed more support before it could be established. Tyler hoped to gain such support by leading a drive for the annexation of Texas by the United States.
Texas had declared independence from Mexico in 1836. Although Texas had succeeded in maintaining its independence as a result of its victory in the Texas Revolution, Mexico still considered it part of its territory, and threatened war with the United States should the US annex Texas. Another problem was that many Americans worried that annexing Texas, which permitted slavery, would upset the sectional balance within Congress.
Tyler believed that annexing Texas was a way he could achieve political respectability. His new party, the Democratic Republicans, used the slogan "Tyler and Texas!"