Starting with CodingJeebus' comment, the context of the discussion is what the US federal government can and cannot do, or does and does not do, at the best of a single person (the US President). They have the power to direct destruction, but not the power to direct creation.
Not only is a state government's capabilities irrelevant, it is also incomparable to the might of the US federal government, given its unique ability to sell US Treasuries and issue US currency. State governments are also in competition with each other, unlike the federal government which is in competition with other countries and has more power to restrict and negotiate trade agreements.
