Kraft told a small crowd of supporters in Boston’s “Grove Hall” neighborhood he thinks Boston is heading in the wrong direction, pinning the blame on his opponent, incumbent Mayor Michelle Wu.

After months of speculation and rumors, Josh Kraft officially announced his mayoral campaign Tuesday morning. Addressing a crowd inside Dorchester’s Prince Hall, Kraft outlined his personal history and vision for Boston, and previewed some ways in which he plans to attack Mayor Michelle Wu during the upcoming campaign.

Josh Kraft, the longtime nonprofit leader and third son of billionaire Patriots owner Robert Kraft, officially launched his bid for Boston mayor on Tuesday, becoming the first major challenger to Mayor Michelle Wu and kicking off what is likely to be a harsh battle for City Hall.

Josh Kraft, the son of New England Patriots owner Robert Kraft, formally launched his campaign for mayor of Boston on Tuesday.

Josh Kraft, the billionaire son of Patriots owner Robert Kraft, launched an ambitious campaign for mayor of Boston today, calling for rent control, a boost to affordable housing development and a pause on the city’s controversial White Stadium project.