Reid Wilson for WaPo:

Here in the Senate battleground of Colorado, the latest front in the voting wars is  the mailbox.

In other states, that fight has generally centered on laws that opponents say restrict voter access – measures, largely passed by Republican legislatures, that require voter identification or reduce the number of days for early voting.

But Colorado is  operating under a new system designed to do the opposite: For the first time this year, every registered voter will get a ballot delivered to them through the mail, weeks before Nov. 4.