Summary

Charles Evans Hughes James v. Dravo Contracting Company…

The element of discrimination becomes important only in a case where a tax which would otherwise be permissible is aimed at the taxpayer because of his relation to the government. Of course a state cannot lay a heavier burden upon those contracting with the government simply because they are such contractors. A discrimination of that nature on its face spells a hostile purpose, an intent to hinder and burden the government, to impede its operations, and to discourage dealing with it.
Source: Wikisource

Charles Evans Hughes James v. Dravo Contracting Company…

While it is of the utmost importance that all the powers vested by the Constitution of the United States in the General government should be preserved in full efficiency, and while recent events have called for the most unembarrassed exercise of many of those powers, it has never been decided that State taxation of such property is impliedly prohibited.
Source: Wikisource

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