BY OLYMPIA MEOLA

President Barack Obama’s campaign is boosting its number of offices in Virginia to 20.

It will open three more offices tomorrow in Hampton, Portsmouth and Martinsville, adding to the 17 already sprinkled around the state.

The Republicans’ “Victory 2012” campaign – an umbrella effort of presumptive GOP presidential nominee Mitt Romney’s camp, the Republican National Committee and the Republican Party of Virginia – now has 23 offices in this battleground state, reaching that number on June 30 when more than a dozen offices opened.