The Colorado Sun: Big money is pouring into the Proposition CC campaign – and Colorado voters may never find out where much of it is coming from.

That’s because dark-money nonprofits are contributing heavily to supporters and opponents of the 2019 ballot question to end TABOR revenue limits. That dark money — totaling nearly $3 million — is fueling an advertising battle on radio, TV and elsewhere. 

And a new law aimed at identifying donors behind dark money doesn’t apply to issue committees involved in ballot questions or recall elections. The Clean Campaign Act — championed by Secretary of State Jena Griswold and signed in May by Gov. Jared Polis, both Democrats — requires disclosure of donors to nonprofits only when they contribute to committees involved in candidate campaigns.

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