Starting a war with Mexico would be a pretext for interning everyone of "Mexican" ethnicity, citizen or otherwise, as was done to Japanese nationals.
replyIts mincing words a bit, but an attack targeting drug cartel assets wouldn't necessarily be viewed as a war with Mexico. It could lead to that for sure, and the Mexican government could declare it an act of war, but we did just see the US literally invade a foreign country and arrest their sitting leader without war being declared on either side.
replyYet. It has certainly ratcheted up worldwide tensions, to put it mildly.
replyThe US hasn't declared war since World War II.
replyI suspect Mexicans would view it as another Pancho Villa Expedition, which was also event where neither side declared war.