Argh, I missed the good discussion.
Naval gunfire: No.
We do NOT have ANY naval assets capable of inland bombardment. Yes, the remaining Iowa-class battleships are "reserve status", but that means NOTHING. It's a formality, IF it's even still a thing. To put the, what, two remaining Iowas to sea would require YEARS of restoration, rebuilding, and rewiring. Not to mention that the last time we did it, we had to pull 60-year-old WWII vets back to train people on how to fire a 16 inch gun. Even without the issues of training people to use a freaky hybrid of WWII equipment and (somewhat) modern equipment, battleships take THOUSANDS of men to operate, men who are generally better put to use elsewhere. Unless we enter another LENGTHY conflict that requires the sort of massive artillery bombardment that can only be fulfilled by a battleship firing against enemies with no antiship missiles and no aircraft power to speak of, the Iowa-class battleships will never again be activated.
As for other ships, we MAYBE have a few 6-inch guns scattered around on the Zumwalts, and five-inchers (Which are effectively useless for naval bombardment, by the way) on a few other ships.
Basically, it's technically infeasible for a multitude of reasons to lay down a naval bombardment with regular guns. The only things we could use from the navy are aircraft (Totally different kettle of high-flying heavily-armed fish) and missiles, and missiles are for STRATEGIC (As opposed to tactical) targets only, since they have such a long time-to-target and are relatively expensive.