Answer:
The answer is below
Step-by-step explanation:
The United States could have probably drawn into a different war with Mexico, simply because it is very likely that Mexico will adhere to Zimmerman's request in the hope to reclaim their lost land (Texas, New Mexico, and Arizona) with the support of Germany and their submarine weapons.
Also, the United States would not have decided to enter into war by joining the Allied forces.
Again, the probable war with Mexico will distract the United States to focus on the World War stage.