War of words on twitter….

Former New York Gov. George Pataki has launched a broadside against Donald Trump over his controversial remarks on Mexican immigrants, sending an open letter this week to every other Republican presidential candidate urging them to “denounce his comments today.”

The letter has, in turn, triggered a bitter Twitter feud between the two 2016 candidates, as Trump also spars with everyone from NBC to Macy’s to the New York City government.