Roosevelt lost his mayoral race in 1886 .
Pioneering photojournalist Jacob Riis documented the poor conditions of immigrant tenement dwellers in his 1890 How the Other Half Lives ; he was befriended by Republican reformer Theodore Roosevelt .
reformer lost Theodore Roosevelt 's mayoral race in 1886 .
Pioneering photojournalist Jacob Riis documented the poor conditions of immigrant tenement dwellers in his 1890 How the Other Half Lives ; he was befriended by Republican reformer Theodore Roosevelt .