Name this state with capital Denver.
In 1992, this state's citizens voted to add a "taxpayer bill of rights" to its state constitution. A gold rush along the South Platte River in this state led to the founding of towns like Central City and Cripple Creek, but it sparked a conflict with natives that led to the Sand Creek massacre. In 2008, this state hosted the Democratic National Convention where Barack Obama was nominated. Name this state with capital Denver.
In 1992, this state's citizens voted to add a "taxpayer bill of rights" to its state constitution.
Colorado