LAS VEGAS — Russ Wheeler bears the financial scars of Nevada’s lost decade, and he hopes Donald Trump can heal them.He worked for a Las Vegas roofing company when the real estate bust crushed the state’s economy. He took two pay cuts before getting laid off. He had to commute into the California desert to find work after that. Wheeler considers himself one of the lucky ones. He was able to build up enough savings to retire, but even now his wife had her teaching hours reduced at a community college, dramatically reducing their household’s income.“It’ll be better with Trump because he’ll bring the jobs back,” Wheeler, 66, said as he stopped by a Republican Party office to scoop up some “Make America Great Again” yard signs and bumper stickers. “Everybody I know is a Trump supporter. He resonates well in Nevada.”Nevada is the most diverse battleground state. On paper, it should be secure for Democrats. But there are enough people like Wheeler, still rattled by the recession and frustrated about other things, to make it one of Trump’s best swing states.