Rick Santorum’s campaign believes it has found a way to cut into Mitt Romney’s delegate lead and potentially prevent the former Massachusetts governor from collecting the 1,144 delegates needed to secure the Republican presidential nomination. Santorum’s unorthodox strategy centers on states where delegates are selected at local party conventions, after the popular vote has been held. In those states, such as Washington, where Romney won the popular vote at the caucus, Santorum could still lure delegates to his side because, at the convention, they do not have to follow the results of the popular vote.