He pretty clearly does not support sending troops into Mexico from the video?
it's... really clear, he puts like 5 conditions that would never occur on sending troops to Mexico if the Mexico government desperately wanted it and there were no other alternatives.
How about zero conditions? How about we not do it at all period? The absolute best thing America can do for Mexico is to END THE DRUG WAR. It is entirely possible for them to do that with domestic policy, and to really hammer the point home, the U.S Government can lobby allied countries with a similar hostile attitude towards drugs to do the same.
Seriously this is not even up for debate. I don't care what circumstances Mayor Pete thinks he can put on it, armed intervention by the U.S army into Mexico is possibly the single worst foreign policy idea currently going around. You think the border is bad now?