Latino Voters, Once Solidly Democratic, Split Along Economic Lines

A few miles from the Las Vegas Strip, in a working-class neighborhood of one-story homes and scattered palm trees, Vania Oronoz is pushing her husband to give up his habit of voting for Democrats.

Mrs. Oronoz and many of her neighbors are shifting toward the Republican Party, a pattern that’s being replicated across the country. The move has been especially pronounced among working-class Latinos, whose votes have the potential to reshape the political parties in the same way that the movement of white, working-class voters has made them a pillar...