How does the commerce power of the federal government limit the state commerce power?"?

Answer 1

The Commerce Clause in Article I Section 8 of the Constitution says that Congress may regulate interstate commerce. This was a crucial part of the Constitution, since we wanted to avoid states putting tarriffs on other states' merchandise, trading individually with foreign nations, and engaging in economic protectionism of their own states' products (a major problem under the Articles of Confideration).
According, if Congress regulates interstate commerce under the Commerce clause, it may "preempt" any other state action. The "dormant commerce clause" (or the negative ramifications of the Commerce Clause) also prevent the states from engaging in economic protectionism (i.e. no tarriffs on other U.S. states' products; no unreasonable licensing requirements, etc. This came up recently in supreme court cases dealing with interstate shippment of wine).

Answer 2

They take our money to support purpetual wars...not just Bush !! It was our states money and now it is gone...