That is possible by blanket Primary Laws, do you think that there is a real chance Murray could lose to a GOPer like Tiffany Smiley. And do you actually think that the GOP Wave will be bigger than both 2010/2014 combined?
I think it will be bigger than 2010/2014 combined. However, against Tiffany Smiley, I'd expect Murray to win by a similar margin to Christine Gregoire in 2004. Republicans need a stronger candidate (Jaime Herrera Beutler, Dave Reichert, Rob McKenna, Dino Rossi) to beat Murray, even in this climate.
There is no reason to believe this whatsoever.