There’s an old Aesop fable that warns readers not to “nourish a viper in one’s bosom.” According to the story, the viper will always turn around and bite its benefactor once it is strong enough. It’s a lesson the New York Republican Party seems to be having some trouble grasping. The party has chosen wealthy private security executive Mike Sapraicone as its preferred nominee to take on Democratic Senator Kirsten Gillibrand, despite his history of donations to liberal causes and Democrat candidates. Sapraicone easily won the support of 84 percent of delegates at the state Republican convention on Thursday. Party...