The federal government is supposed to exercise the powers it does have. Enforcing the 14th amendment is one of them. Brown v. Board of Education was a good example of why precedence should not be held sacred when the past decisions clearly conflict with the plain meaning of the Constitution. State and local governments are less likely to overreach in ways that the citizens are powerless to change. Especially for small states, the federal government is too controlling, and there's little they can do about it. When there's 50 states, if one overreaches, you can leave. It's much harder when the federal government is doing it. The best argument against liberals' love of a strong federal government is that quite often people like George Bush get control of it.