Winnie the Pooh is a (fictional) female bear. “Winnie,” after all, is a feminine name.
Humpty Dumpty is not an egg in the original (satirical) verse.
The United States is not a nation. They constitute a political union, and even the Constitution makes this quite clear. Of course, nationalists — like George Washington, Alexander Hamilton, Abraham Lincoln — pushed ”national” union, but their pushes are wishes, not truth. These United States contain many nations, and those nations are becoming increasingly froward and prone to disunion.
It is quite possible to make associations that belie original intention and even reality. Most people think of Winnie the Pooh as a silly boy bear, Humpty Dumpty as a broken shell of an eggman, and the U.S. as a nation. Most people are wrong.
But in the realm of myth, error’s easy.
twv
Wirkman Comment 
“Well, when Edward Bear said that he would like an exciting name all to himself, Christopher Robin said at once, without stopping to think, that he was Winnie-the-Pooh. And he was.” — A[lan] A[lexander] Milne, Winnie-the-Pooh, Introduction