National Popular Vote Interstate Compact has the possibility to be devastating however, thankfully it shouldn't be in play in 2020.
"the agreement would go into effect among the participating states in the compact only after they collectively represent an absolute majority of votes (currently at least 270) in the Electoral College."
Right now.. "they have 196 electoral votes, which is 36.4% of the Electoral College and 72.6% of the 270 votes needed to give the compact legal force."