The federalists appealed to business and the republicans to planting and farming
When you say that someone has lost his head over something it means they have an obsession towards that thing. Liking something too much is a form of obsession. So the feelings projected by Aunt Agatha is a concern that Gussie likes America too much.
I believe that the sentence uses a simile, because it uses the word "like" to compare the villain's face to that of a statue.
I think it’s “ Swimming swiftly, was the only way for the dolphin to stay with its pod “