A key swing state is becoming a battleground for social issues.

Colorado’s electorate is almost evenly divided between registered Democrats, Republicans and unaffiliated voters, but the state has swung left in recent years.

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In 2013, Democrats pushed through pieces of legislation allowing gay civil unions, mandating green energy use in rural areas, and strengthening gun control.

Several rural counties threatened to secede and, for the first time in the state’s 137-year history, two Democratic legislators were recalled.

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Watch Alicia Acuna’s full report above.