The Senate Republican campaign operation is citing a Tuesday exchange between California Democratic Sen. Barbara Boxer and U.S. Army Gen. Michael Walsh in its latest fund-raising pitch to supporters. During a hearing before the Environment and Public Works Committee, Walsh referred to Boxer as “ma’am,” a moniker the chairwoman did not appreciate. “Do me a favor, can you say ’senator’ instead of ‘ma’am’?” Boxer said, interrupting the Army general. “It’s just a thing. I worked so hard to get that title, so I’d appreciate it. Thank you.” Smith responded: “Yes, senator.” In an email pitch to supporters, National Republican Senatorial...