As I remember, Lake Research is part of the usually-associated-with-Democrats polling firm Lake, Snell and Perry and pollster Celinda Lake, who does the Battleground poll with Republican pollster Ed Goaes.
Correct. They had a bad 2004 when they split with the Tarrance Group over the final Battleground poll. Tarrance suggested a somewhat even split in the undecideds, which was proven correct, while Lake put 90% of the undecided vote for Kerry. In the end, Tarrance won in getting the official Battleground poll to be what they wanted. Lake put out a separate interpretation of the poll predicting a Kerry victory.