Plan Mexico in trouble?

A fascinating post at Grits for Breakfast: Bush and Calderon on outs; ‘Merida Initiative’ may not pass Congressional muster
Given that internal forces in both countries are already very upset that the negotiation was done in secret, if Bush and Calderon are at odds, then Plan Mexico is on shaky ground indeed.
However, I can’t help thinking that the lure of fluid and corruptible taxpayer drug war dollars (both the spending and receiving) is so strong, that they’ll find a way to overcome their differences.