There are a few active in the US already (though it does look like the US is lagging) https://en.wikipedia.org/wiki/List_of_HVDC_projects https://en.wikipedia.

There are a few active in the US already (though it does look like the US is lagging) https://en.wikipedia.org/wiki/List_of_HVDC_projects https://en.wikipedia.org/wiki/List_of_HVDC_projects