Top Democratic officials who worked on the party's still-secret autopsy of the 2024 election concluded that Kamala Harris lost significant support because of the Biden administration's approach to the war in Gaza, Axios has learned.Why it matters: The Democratic National Committee's research on what went wrong in 2024 has been under lock and key since party leaders decided last year to hide it from the public — a reflection of how explosively it could resonate within the party and beyond.Progres...