William Howard Taft,
Oregon-Washington Navigation Company v…
“ In the absence of any action taken by Congress on the subject-matter, it is well settled that a state, in the exercise of its police power, may establish quarantines against human beings, or animals, or plants, the coming in of which may expose the inhabitants, or the stock, or the trees, plants, or growing crops, to disease, injury, or destruction thereby, and this in spite of the fact that such quarantines necessarily affect interstate commerce. ”
