Under NERC, we would have to give notice, and a reason to open the disconnect. Otherwise, like back in 2003 the US power companies would have a right to sue for damages under the NAFTA agreement. (They didn't sue, because the fault occurred in a switching station in Ohio). While I don't know for sure, I'm certain that clause stayed in after Trump renegotiated.Canada didn't turn off the electricity today, but they did slap a 25% punitive tariff on electricity exported to the United States. What a shame, I was looking forward to seeing the folks in Maine squealing in the dark. The way I look at it, they sent Susan Collins back to the Senate, it's way past time they learned that their actions have some very real consequences.
However, it is a real threat, one Trump should weight very carefully, the same applies to shutting off the Oil,and any MAGA who thinks that is no big deal, should ask themselves why Trump wants the Keystone XL pipeline restarted.....