The Secretary of State to the Ambassador in Mexico (Daniels)
Dear Mr. Ambassador: I have read with very great interest your letter of March 13, 1940 suggesting the possible advisability of your having an interview with President Cárdenas with reference to matters pending between the two countries.
I share your apprehension, stated in the second sentence of the second paragraph of your letter, that the oil question might be a barrier to such a general discussion between you and the Mexican President at this time.
We are now dealing intensively with the oil and land matters and have recently taken up important aspects of the Rio Grande water question. These are all so important and complex that I doubt we should enter into discussions of other matters until some progress is made with at least some of those mentioned. In the circumstances, it seems better to confine our activities to the subjects now in hand, at the same time keeping in mind the idea of general discussion of other matters for later consideration as conditions may permit.
With kindest personal regards,