Final answer:
The author's statement indicates that the challenges America was facing were deeply connected to the core values and identity of the nation.
Step-by-step explanation:
The author's statement about the challenges America was facing at that time indicates that the challenges were deeply connected to the core values and identity of the nation. This can be seen in the mention of defending those in need, supporting a nation's right to self-determination, and creating an America that lives up to its own lofty ideals. The statement suggests that the challenges faced by America were not just external, but also internal and had a significant impact on the national identity.