I find it funny that you only focus on the people in blue states and fail to realize that if something like a blue state succession attempt ever took place that it would include all 50 states as there are blue/red across this country, which means we would have a full blown civil war.
Do you even realize how many states are purple, and how many would actually be blue, if it wasn't for the gerrymandering that happens in many red states to keep them red? You seem to believe that blue states have no loyalists in the armed forces, they wouldn't have the "right" people on their side, that they themselves are not heavily armed, or have access to any military armorments/soldiers. Heck, even if that was true (it's not) The history of this country and it creation shows your argument is faulty, because if your argument was sound, we would have never been able to succeed from Britian as they had the military, the arms, the ships, etc. You underestimate the power of determination and the fight for survival, and that would be what a blue succession would be all about.
In short you are extremely naive and/or ignorant.