ABC news reports:

1 in 10 U.S. Deaths Blamed on Salt

"The new study, by the same Harvard research team, linked excessive salt consumption to nearly 2.3 million cardiovascular deaths worldwide in 2010. One in 10 Americans dies from eating too much salt, the researchers found...."

There is a high salt content in many canned and frozen food products as well as food prepared  by national chain restaurants.  Some portions served in restaurants in interstate commerce exceeds the MDA in sodium content.  People who are restricted from eating salt for medical reasons or personal choice are force to eat high sodium content with out a choice of salt free food.

Due to the above resaons salt should be banned nationally by law from the preparation of food involved in interstate commerece. If people want salt  in their food, it is their choice to add it.