Donald Trump is leading big in 4 of the most important states left on the primary map

Getty Images Of the four states with the largest delegate totals remaining, GOP frontrunner Donald Trump is leading them all, as the Republican presidential field heads into another election day Tuesday. Polls show the real-estate mogul holds a 13-point lead in Arizona, the largest remaining winner-take-all state, which holds its primary Tuesday.  He also he finds himself with double-digit polling average leads in New York and California, as well. Those three states award the most remaining p...