Article on US efforts to fix its shipbuilding industry:
Any sort of significant increase is going to take decades to bear fruit. China didn't build its shipbuilding industry overnight. It has taken decades to get to the state it is in now. These things are not easy and take tons of money, politics and man power to see meaningful progress.
I posted a link to an article a while back that showed conclusively that the US was never really a major commercial shipbuilder, and even during World War 2 its yards were less efficient than those in the UK.
Any sort of solution is going to have to be two track. They need to change the laws so ships can be built in Japan and Korea while at the same time investing in building out their own shipbuilding capability. So its going to be extremely expensive. Oh, and it also has to survive changing political winds and a billion other things.
EDIT: Oh, and they are going to have to subsidize any commercial ships built in the US to to tune of billions of dollars per year due to the likely massive cost differences that exists between ships built in the US and Japan/Korea/China... and that assumes the quality can be good enough that people would even want them from US yards.
Double Edit: Also, China may have spent years supporting their industry, but as a country China likely had better incentives for people to work in shipbuilding. Shipbuilding in the US has to compete with dozens of other industries that pay just as good if not better and offer a far better work life balance.