our guest is john greenbaum.served as a trial attorney at the department of justice civil- rights division. that was from 1997-2003. currently, he works for the legal committee. someone writes in on twitter and asks, what about poll watchers to verify the vote. what authority do they have and do all states allow them in poland places. -- in polling places? guest: some states allow for nonpartisan election observers. as i mentioned before, we are involved in a non-partisan election program. in some states, our people are able to be there to see what is going on. in others, they are not. in every state, you're out partisan poll watchers. one thing that differs between the two groups is what can these partisan poll watchers do? in many states, they can challenge of voters. that is something that we looked at very closely on election day. there are circumstances where it is legitimate to 44 to be challenged. for example, if the poll watcher -- for a voter to be challenged. the for example, if the poll watcher knows t