Many of our readers are door-knocking or calling voters in Virginia. The following data suggests that your efforts are paying off.

According to Real Clear Politics, Senator Obama is building a substantial lead in Virginia. Here are the poll averages by week from the start of September.

September 1 – September 7
Two polls, Obama 47%, McCain 49%, Margin -2.0

September 8 – September 14
Six polls, Obama 45.3%, McCain 47.7%, Margin -2.4

September 15 – September 21
Five polls, Obama 47.6%, McCain 47.2%, Margin +0.4

September 22 – September 28
Three polls, Obama 48.7%, McCain 47%, Margin +1.7

September 29 – October 5
Five polls, Obama 50.6%, McCain 43.8%, Margin +6.8

It’s hard to imagine something more encouraging for Obama volunteers (or more demoralizing for Senator McCain’s supporters).