Slander, pure. Here it is: Coulter's voting address and any attempt she may have made to vote with a wrong address is an slanderous point to bring up in a discussion about her book. It's an unrelated issue, thrown in only for the effect of defaming her.
The left wants to keep women high-heeled, aborted, and in an office.
That is one reason they absolutely hate such women as Coulter, Schlafly, Thatcher etc etc