What about the charge that this will increase the rate of “invalid” ballots in Colorado?

A:

Providing an additional 1 million voters who pay for an election the opportunity to participate in that election should be our top priority. 

The estimates put forward in the Blue Book are wrong, and are being used by partisans opposed to our measures. (The Blue Book will declare 7% spoilage based on data out of WA, but the actual number is closer to 0.51%.)

Simple instructions to vote in one primary, but not both, are no more complicated than instructions to use a certain color pen, to fill in a bubble or complete an arrow, to use a privacy sleeve, to sign the back of the envelope, and to return it before 7 pm on election day.