It's hard to predict. 2008 could be just a fluke. But I don't think we can tie Minnick victory with Obama landslide election, since no one than McCain won in landslide in Idaho.
Minnick can become a safe seat Democratic Congressman in a very Republican state, just like, as you mentioned, Matheson or Boren, or really can be an accidental short-termer. We shall see...
Back in 2008 I was also suprised by his win.
I wonder what's going to happen with two freshman Democratic Representatives from Alabama: Bright and Griffith. Problem is pretty smilliar.
I agree with you on Bright, but Griffith in AL-05 is a different situation. That seat has long been a Democratic seat. Its much more rural.