CHICAGO — State and local Democratic leaders are officially declaring their intent to try to bring the 2024 Democratic presidential nominating convention to Chicago, releasing a video that promotes the city for its diversity, its cultural and culinary attractions, and its status as the adopted hometown of the party’s previous president, Barack Obama. “Leading the battle on voting rights. Advocating to preserve all civil rights. Suppression. Oppression. We’re fighting for equality. It’s why we’re known as the heartland of democracy,” artist and activist Common, a native of Avalon Park, says in …