"There certainly is a lot of political pressure for states to adopt the new federal tax codes. But there is no law that requires them to do so"

John Barry's quote suggests that although there is a great deal of political pressure for states to embrace the brand-new federal tax codes, there is no legal requirement for them to do so. This indicates that states have the freedom to pick whether or not to adopt the brand-new tax codes, and that the decision is ultimately up to them. This could be viewed as a favorable thing, as it allows states to make decisions that are best suited to their own individual requirements and scenarios. Nevertheless, it could also be viewed as an unfavorable thing, as it might cause an absence of uniformity in the tax codes across the nation. Eventually, it is up to each state to choose whether to embrace the new federal tax codes.