I just got off the phone with Susan Shery, chair of the King County Democrats, who says Democrats have been busy poring over that list of 1,945 voters who Republicans fingered as being illegally registered to P.O. boxes and storage units. And while the Republicans have so far admitted 140 errors on their list, Shery says Democrats have found hundreds more voters on the list who Republicans have erroneously challenged. In addition, Shery says, 535 people on the Republicans’ list are inactive voters — meaning they haven’t voted in the last four or so presidential elections, and thus aren’t very likely to be committing vote fraud in this off-year election.

If this is true — and it seems in line with what I’m hearing from Slog readers — then State Republican Chair Chris Vance’s claim of an only 10-percent error rate on the Republican list is way off.

My rough calculations put the Republicans’ error rate at closer to 20 percent, if the Democrats are right.

I asked Shery whether the Democrats are considering a lawsuit over all the erroneous challenges, which were made by Republican party official Lori Sotelo “under penalty of perjury.” The short answer is yes.

“We’ll be looking at that after the election,” Shery told me. “This is a warm-up for 2006. They’re going to do this everywhere, they’re bragging about it.”