Senate Republicans concede they are not likely to have enough votes to overturn President Obama’s nuclear deal with Iran unless they can swing a key Democratic voice against the accord. They’re setting their sights on Hillary Clinton, vowing to tie her to the deal in hopes of pressuring her to oppose it. GOP leaders need 67 votes to override Obama’s expected veto and keep sanctions on Iran in place. The administration has not yet announced an accord but lawmakers expect it to come soon. “It could be a good policy strategy. It’s not going to be hard to come up...