The American response to the Suitfall was immediate. Conditioned by decades of alien invasion movies, the Suitfall caused waves of public panic to erupt across the nation. With a decent portion of the US' military occupied controlling "End of the World" riots, the other half focused every effort on locating and securing any pods it found in the interest of national security. Pods that were located untouched were trucked away to secret research facilities, but most were already claimed by random members of the populace, who responded to their newfound abilities in a variety of usually unlawful ways. When met with the overbearing power of the US military, most of these individuals chose to go into hiding or leave the country as quickly as possible, allowing for normalcy to be established in relatively short order.
Less than a year after the Suitfall, however, the Symbiote's became a known threat to the world. With large swathes of the Canadian icelands fully infested, the US lead the charge against the space creatures, locking down its border with Canada tightly and shifting the bulk of its massive military to establish an exclusion zone in the far north region. The expeditionary force works  closely with the Canadian government to successfully contain and eliminate the invasive creatures, though the amount of land "claimed" by the control zone seems rather large; some would say unessecarily so. Rumours of armored caravans with bio-containment spheres traveling through the Canadain backroads also persist, calling into question the altruism of the US occupation of North Canada.
With the increase in world conflict since the Suitfall, the US continues to enforce its "World Police" policy. US-loaned troops and funding make up the backbone of UNISSO, and the government continues to hunt down rogue suit users whom are perceived as too radical or dangerous to national security. The military has benefited greatly from reverse-engineered suit-tech, most notably with first-generation exo-suit soldiers already being deployed to areas of conflict.
The US is currently eyeing its border with Mexico, which has become a hotspot for mercenary activity lately.