Mexicans back ex-president Fox in spat with Trump

Mexicans have shrugged off ex-president Vicente Fox's use of the F-bomb in a verbal spat with US presidential hopeful Donald Trump.

US Republican presidential candidate Donald Trump in another stoush. Source: AAP

Fox called the Republican front-runner "crazy" and a "false prophet" and Trump replied that Fox ought to be "ashamed of himself" for using a profanity.

Mexican locals sided with the usually unpopular ex-leader over Trump, who is probably viewed even more negatively by Mexicans.

Last year, Trump attacked immigrants as "rapists" who bring crime and drugs to the United States.