No Republican is going to lose ME-02, regardless of whether they are "populist" or not lol. While Democrats are certainly favored in NE-02, it could conceivably flip in this kind of environment.
BTW: It’s beyond hilarious that people keep ignoring the successes of other, less 'populist' Republican candidates in districts/states that have been trending strongly Republican and just chalk it all up to "populism" (as if IA totally didn’t elect Joni Ernst by a wide margin in 2014, OH Republicans didn’t completely crush it in 2014, and noted populist Bruce Poliquin didn’t win in 2014). These R trends very much predate Trump.
Good point, I've noticed this as well.