Bernie Sanders is airing his first television ad in two early presidential voting states, hoping to introduce himself to a broader slice of the electorate. The new ad marks the next phase of Sanders’ campaign, as he seeks to build momentum after a stunning summer surge in which the self described democratic socialist drew massive crowds to campaign events across the country. His biggest challenge will be to broaden his base beyond the party activists, millennials and aging progressives drawn to his unorthodox campaign. The ad will air statewide in Iowa and New Hampshire and is part of a $2 million-plus ad buy, his campaign said.