New York Republicans and even some Democrats called Hillary Clinton’s characterization of Donald Trump’s backers as a bigoted “basket of deplorables” a major blunder that will badly damage her already-faltering campaign. “It’s Exhibit A of her political incompetence,” a prominent Democratic operative who strongly supports Clinton told The Post. “I think a lot of Democratic strategists are in a state of disbelief at how clunky Hillary’s campaign has been. “It’s been a year-and-a-half and she still can’t answer the goddamn email question, and despite outspending Trump by huge amounts, she’s losing ground to him every day and the race is...