To me it seems like a DICTATOR.
The president is commander in chief and has the power to control the military. This allows him to enact martial law which can be used on our own soil to put down rebellions and threats to our public peace as well as our institution.
Basically my best bet is martial law.
Answer:
The Zimmerman note and unrestricted submarine warfare by Germany
Explanation:
The Zimmermann Telegram was a note from German official to offer military alliance between Mexico and Germany. President Wilson understood the diplomatic relation and broke off the relation and decided to enter the WWI.
Germany was repeatedly attacking U.S. by submarine warfare in the Atlantic that killed ore than 120 U.S. citizens on May 7, 1915 that provoked outrage in the U.S. to participate in WWI.
Hence, the two reason are The Zimmerman note and unrestricted submarine warfare by Germany.