Some may question the sincerity. However, at least the guy acknowledges God. I am not sure that any leader could save America though. Day after day, rather than repentance we see evil decisions from courts. We see gangs given carte blanche to riot and kill and destroy, while any coming together by churches of believing leaders is denounced and the most vile evil.
I could be wrong but it seems like judgment is at the gates, and the rains are already starting to fall.
I think it would take more than a president to save the country. It would take God. Since they fight His word and ways and people, why should He? I think what many countries need to learn is some fear of the Lord.