Zumwalt meant foremost to be a coastal "battleship" giving marines cover with her special guns but was dropped because the guns were too expensive to operate. Here the wiki page:
en.wikipedia.org
The
Zumwalt-class destroyer is a class of three United States Navy
guided missile destroyers designed as multi-mission
stealth ships with a focus on land attack. It is a multi-role class that was designed for secondary roles of surface warfare and
anti-aircraft warfare and originally designed with a primary role of naval gunfire support. The class design emerged from the
DD-21 "land attack destroyer" program as "DD(X)" and was intended to take the role of
battleships in meeting a congressional mandate for naval fire support.
[12] The ship is designed around its two
Advanced Gun Systems, their turrets and magazines, and unique
Long Range Land Attack Projectile (LRLAP) ammunition.
[9] LRLAP procurement was cancelled, rendering the guns unusable,
[9] so the Navy re-purposed the ships for surface warfare.
[13]
The constellation class is a very smart decision on the USN part because they can make AEGIS class equivalent on the cheap & fast.