US-Mexico relations have had many highs and lows. Some examples of the later include: The US annexation of Texas, which ultimately led to the Mexican-American War (1846 - 1848). The US occupation of Veracruz (1914).
Mexico refused to recognize the annexation.
the German telegram to Mexico
No. Such is an example of relative location.
Right now, uneasy neighbors but close trade and business partners.
Increased death and destruction
It damaged the US-Mexico relations for decades, without a clear benefit being attained.
Mexico does NOT have nuclear weapons. Its of no use to us. Mexico has what many countries crave, no problems with other countries, so much so, that Mexico's military isn't trained for war, its just trained for defense inside the county. If Mexico began to produce nuclear weapons, it would mean a large split in US-Mexican relations, and Mexican-World relations.
so no tariffs would have to be paid and to expand relations.
Mexico broke off diplomatic relations with the United States after the annexation of Texas in 1845. The annexation was a significant factor leading to heightened tensions between the two nations, ultimately culminating in the Mexican-American War (1846-1848). Mexico viewed the annexation as an act of aggression and a violation of its sovereignty.
The US' occupation of the Mexican port of Veracruz in 1914 had already strained relations between Mexico and the US to the point that war among both countries was very likely.
Major General George B. McClellan was aware that Texas and the US Territories bordering Mexico were potential trouble spots for the US. With regards to that, McClellan recommended that the US maintain cordial relations with Mexico as a means of intelligence gathering on Confederate forces that may try to dominate US areas in the Southwest.