I found this while perusing
http://www.snopes.com/ and guess what: IT's TRUE!!!
http://www.snopes.com/history/american/texas.aspClaim: A clause in the document annexing Texas to the United States allowed for Texas to be divided into five different states.
Status: True.
Origins: After several years of contentious debate, in
1845 the United States' various political factions finally reached enough of a consensus to agree that the benefits of annexing Texas (nominally an independent republic ever since it had been wrested from Mexico after the decisive 1836 battle at San Jacinto, although neither Texas nor Mexico ever accepted the treaties signed a few weeks later) outweighed the pitfalls. As T.R. Fehrenbach noted in his history of Texas, the nascent republic was ill-suited to maintain itself as a sovereign nation, and the presence of such a tenuous political entity in the midst of North America posed a threat to the ambitions and interests of the United States: