Reps. Steven Horsford and Dina Titus both know what it’s like to be on the losing end of a midterm election wave. The Democratic House members from Nevada may each soon have the unenviable experience of going through it twice. Horsford, Titus, and Democratic Rep. Susan Lee all face fierce GOP challenges on Nov. 8 for their Las Vegas-area House seats. The Nevada seats are an important element of House Republicans’ plans to nab the majority, which requires a net pickup of only six seats in the 435-member chamber. Nevada is even more pivotal to Senate Republicans’ quest for a majority in the next Congress. Democratic Sen. Catherine Cortez Masto is seeking a second, six-year term. But she’s consistently running behind in polls against her Republican rival, former state Attorney General Adam Laxalt. ANALYSIS: NEVADA...