A USDoJ attorney from Washington, DC is at the 2nd Ward now. CCDC Attorney John Carnes called and said he is on his way there.
"Challenging a voter: A voter's right to vote in the precinct can be challenged by an elections worker, poll watcher or another voter. The challenge must be addressed to the judge of elections, not directly to the voter. There are only two legal reasons to challenge a voter: The voter is not who he or she says he is or the voter does not live in the precinct. A voter's eligibility to register to vote cannot be challenged at the polls. The judge of elections may determine what is a "good faith" challenge.
Challenging all voters is not allowed. Nor is systematically challenging voters of a particular race, ethnicity or other group.How a challenge works:
When the judge determines a challenge is in "good faith," the voter can bring another voter from the precinct to vouch for his or her identity or residency by signing an affidavit. After that, the voter can vote as normal. If the voter is unwilling or unable to find a witness, he or she can cast a provisional ballot.
Provisional ballots: Cast in cases when a voter's right to vote in the precinct cannot be verified, such as when a voter is challenged, does not appear in the poll book, goes to the wrong polling place, or does not have ID when voting for the first time in the precinct. Provisional ballots are sealed and are counted only after the voter's right to vote in the race is verified."