Newly created states each get two senators; if you think that a newly created state will side with yours on many or even just a single significant political iss

Newly created states each get two senators; if you think that a newly created state will side with yours on many or even just a single significant political issue, there is a political benefit to incorporating new states. Creating a state is also a one-way transition in the United States; incorporating a territory as a state is a way to ensure that the territory will never be traded away or declared independent.