Well we don’t have to ‘imagine’ what it would be like relying on the blue states for protection. We can look to recent history. The 9/11 terrorists targetted blue-state planes, blue-state citizens, and blue-state locations. We all know how well they were defended.
I was n’t thinking of protection I was thinking of expected Texas to make up for the shortfalls in revenue of those other wuthless red welfare states that secede with you. :)
Who would you need protecting from anyway?