CHICAGO — Former President Obama will headline the second night of the Democratic National Convention under the banner of the Democrats’ “Bold Vision for America’s Future.” The convention, which is being held at United Center, started Monday and runs through Thursday, when Vice President Harris will formally accept the Democrat presidential nomination with her running mate, Minnesota Gov. Tim Walz.The Democrats’ theme Tuesday night is “A Bold Vision for America’s Future.” The night is expected to focus on how the Harris-Walz ticket intends to present a “brighter vision where everyone will have a chance not just to get by, but to get ahead.” DEMOCRATIC NATIONAL CONVENTION: BIDEN, OBAMA, CLINTONS TO ADDRESS THE PARTY AHEAD OF HARRIS’ NOMINATIONThe Democrats have stressed that the 2024 presidential race “isn’t just a choice between two candidates.” “It’s a choice between two very different visions of America,” the DNC said. “While Donald Trump b …