Actually, a ground based Tomahawk was tested in 2019. Yes, it still needs nuclear warheads back, but it's not a really big problem.
Ground based Tomahawk was a thing for just under a decade. The BGM-109G GLCM was in service from 1983 to 1991, then removed as per the INF treaty.
And no, the system was not "tested" in 2019, it was proposed that in response to the Russians returning to making ground based missiles the US would look at doing the same. But none have been made, none have been tested. All the old GLCM launchers were destroyed decades ago in keeping with the INF, and all that exists is on paper a proposal from 2019 to 2020 to rush out a newer version of the GLCM and a ground based SM-6 "as early as 2023". It is now 2022, and nothing has been done yet other than on paper.
Do you really think the US can put into the field two completely new and untested systems in a year? I don't, and I have been watching the US defense industry for decades.
Unless of course you are for some reason confusing something completely different. Which would not surprise me at all as you seem so very confused about things like this.
Are you maybe confusing the possible return of the GLCM with a Marine Corps proposed system to field land based launchers that are armed with Tomahawk anti-ship missiles? You know, they are not the same thing at all, right? And that is actually a revisiting of an old system that has been requested as the US has not had any kind of ground based anti-ship missiles in decades. And other countries are looking at it with interest, including Taiwan. To be honest, I can't really see the Marines having more than say 3 batteries of that at most. But it would probably be a popular item for overseas sale.
SM-6 can be used as a short range ballistic missile and later it's range will be increased.
Oh big whoop-de-doo.
Yes, that is a theoretical possibility. As it is a possibility for the sea based system.
But wait, the sea based system has that as an ultimate "last chance" capability against surface ships. On the ocean. With a flat surface, and no obstructions like buildings, trees, mountains, etc.
And the SM-6 is not a nuclear system. It has a 140 pound warhead. That's it, just 140 pounds. Do I even have to express the stupidity of making an entire system based on the idea of creating a ballistic missile that only has a bursting charge of 140 pounds? At that small of a warhead, the range does not even matter. A WWII P-51 could drop bigger bombs than that missile can loft.
Oh, and for anything other than fixed target it would be worthless, as it could not even use its standout feature of the active tracking warhead. As it is designed to track moving targets on a flat plane with no clutter or obstructions. You know, like ships on the ocean. Where a 140 pound charge might actually do at least some good, and the tracking warhead is actually of use. Before even thinking of trying to use the SM-6 as a ground based ballistic missile, it would make a hell of a lot more sense to simply revive the LRLAP program than something as idiotic as a ballistic missile with a 140 pound charge.