Its been very controversial, especially because most of the land gows through Maine, cutting a line across it. Without doing much to improve Maine's grid. Mainer's passed a ballot initiative to halt the project, but courts ruled that Mainer's didn't have any right to halt the project.
So, the Central Maine Power (the power company) Corridor - officially called the New England Clean Energy Connect (NECEC) - was back on. With various rounds of tax increases for various states & federal grants. Total cost has gone from $1B to over $1.5b.
Conceptually seems like a good idea! It's so unfortunate that it's such a visible cut through & across the land. And now, with this madness, who knows what the future holds.