JENNIFER RUBIN: Left-wing front group doesn’t like public employee study. “But let’s look at what CREW is and why it’s so interested in telling me bad things about Berman. Back in 2006, long before Karen Tumulty came to The Post, she wrote an informative piece on CREW. . . . So what can we conclude from all this? CREW really isn’t a neutral watchdog group. It has a left-wing agenda that serves the purpose of its left-wing donors. And one of its pet projects is hounding Berman. But I don’t suppose CREW has any interest into looking into George Soros’s multiple organizations. Well, of course not! You don’t bite the hand that feeds you.”