the subject, has been instructed to enter upon the negotiation of a commercial treaty, which, while it will open new advantages to the agricultural interests of the United States and a more free and expanded field for commercial operations, will affect injuriously no existing interest of the Union. Should the negotiation be crowned with success, its results will be communicated to both Houses of Congress. I communicate herewith certain dispatches received from our minister at Mexico, and also a correspondence which has recently occurred between the envoy from that Republic and the Secretary of State. It must but be regarded as not a little extraordinary that the Government of Mexico, in anticipation of a public discussion (which it has been pleased to infer from newspaper publications as likely to take place in Congress, relating to the annexation of Texas to the United States), should have so far anticipated the result of such discussion as to have announced its determination to visit any such anticipated decision by a formal declaration of war against the United States. If designed to prevent Congress from introducing that question as a fit subject for its calm deliberation and final judgment, the Executive has no reason to doubt that it will entirely fail of its object. The representatives of a brave and patriotic people will suffer no apprehension of future consequences to embarrass them in the course of their proposed deliberations, nor will the executive department of the Government fail for any such cause to discharge its whole duty to the country.