The pro power line group funded by the utility trying to build the line, CMP and Hydro Quebec just rolled out the big advertising bucks this week against the opposition. Looks like it will get nasty
https://shameonnrcm.com/
This ad is banner ad on the Bangor Daily News. BDN is the voice of the conservative part of Maine that tends to vote very conservative (they were a big factor in the LePage election). The trade off is most of the population in Maine is in three far more liberal counties along the maine coast. If the voters decide to care about what is going on north of them they will probably vote to stop the project.
Natural Resource Council of Maine (NRCM) is one of the many groups opposing the project. The utility and hydro Quebec stand to make 100s of millions on the project so they will always have deeper pockets than the opposition.
Note that if the Clean Energy Matters is clicked on it just redirects to the ad. CMP is currently universally hated in Maine so they conveniently don't happen to mention that.