Germans, unless you include the English, Scots, Irish and Welsh into a single group, in which case it's English-Celtic.
1. German
2. Irish
3. English
It's also possible that there are more people of English and Celtic ancestry than the census indicates, due to lack of self-identification (6% of the United States see themselves as "just AMERIKKKAN!!!!!").
Mexican
White Europeans in general have the most sway over America's food culture.
I would say that the most popular food in America would be the "Cheeseburger".
eggs
Beef Gerky
mcdonalds
Dogs and cats are the most popular pets in America.
blacks
Golden Retrievers are he third most Popular in America.
The most popular sport in America would have to be baseball.
The most popular food in Illinois is Pizza
Garcia. It is the 8th most popular last name in America, making it the 1st most popular HISPANIC last name in America.
Karen Carpenter is the most popular Dangdut Songstress in America.