Manhattan prosecutors on Friday asked a judge to extend a gag order placed on Donald Trump due to a massive uptick in the number of threats made against District Attorney Alvin Bragg and others involved in his criminal trial. The presumptive Republican presidential nominee is prohibited from attacking witnesses, jurors, court staff and their family members under a gag order imposed before the trial began in mid-April, and prosecutors filed a motion Friday asking for portions of the order to remain in place, reported the New York Times. The gag order currently doesn’t include Bragg or Judge Jua…