I'm in the southeastern US and this is what I think of as "tomato sauce" (as opposed to "spaghetti sauce" or "pasta sauce"):
https://www.hunts.com/tomato-sauce/tomato-sauce-0
http://www.delmonte.com/products/tom...e/tomato-sauce
I'm not a cook myself, but I have seen family members use tomato sauce as base for homemade spaghetti sauce.