US Presidency
1870

It is to be regretted that our representations in regard to the injurious effects, especially upon the revenue of the United States, of the policy of the Mexican Government in exempting from impost duties a large tract of its territory on our borders have not only been fruitless, but that it is even proposed in that country to extend the limits within which the privilege adverted to has hitherto been enjoyed. The expediency of taking into your serious consideration proper measures for countervailing the policy referred to will, it is presumed, engage your earnest attention. It is the obvious interest, especially of neighboring nations, to provide against impunity to those who may have committed high crimes within their borders and who may have sought refuge abroad. For this purpose extradition treaties have been concluded with several of the Central American Republics, and others are in progress.