Senior Fellow of the US Studies Centre Bruce Wolpe says "the US government is forcing Mexico to deal and engage with Mexican cartels".

"President Trump has talked for a long time throughout his presidency about a terrible situation at the border... and the violence and drugs associated with it," he said.

"I think you'll see more drug enforcement action on the US side and more military and intelligence sharing with the Mexicans to attempt to break the back of the cartels if that's at all possible."