How Do You Get The Whole United States To Agree?

Riddle: My first is often at the front door. My second is found in the cereal family. My third is what most people want. My whole is one of the United States. What am I?

Answer: MATRIMONY (mat rye money). Which is certainly a "united state"!

Source: https://www.riddles.com/index.php/134

My first is often at the front door. My second is found in the cereal family. My third is what most people want. My whole is one of the United States. What am I? — How do you get the whole United States to agree? by Anonymous Riddle