Late on election night, when the betting markets were just realizing that Trump’s path to victory had narrowed, and leading voices on the left were lamenting the failure of anything resembling a blue wave to swell up and wash the country clean, Ruben Gallego, a Democratic congressman from Arizona and an Iraq War veteran, tweeted a triumphant message to his supporters: “Az Latino vote delivered! This was a 10 year project.” Gallego had ample reason to rejoice. For the first time since 1996, a Democratic presidential candidate had won the state of Arizona, thanks in large part to strong…