What territory did the mexican- american war open up to american settlers?

The Mexican-American War opened up the American Southwest and California to settlers. Prior to the mid-18th century war, Mexican territory encompassed what is now Arizona, New Mexico, and a bulk of California. However, following the Mexican surrender, the US laid claim to most of that land thereby opening the regions up to American settlers moving west.

Yes i believe he was involved, but the main culprit was bill clinton