"Grass-roots organizing will be critical this year," said Prof. Donald Green, a political scientist at Yale University who has studied voter mobilization.

Barbara has helped elect every sitting Democratic woman governor and U.S. Senator by providing strategic advice, candidate training, direct support, and voter mobilization.

Maggie is the past National President of America Votes, a progressive coalition of over 40 organizations spearheading the largest voter mobilization and education effort in the nation.

Democratic officials also say efforts may be made to better finance state parties, which can pick up costs like voter mobilization and other grass-roots activities.

Republicans say they have also learned the successful grassroots organizing techniques that helped propel President Bush to re-election, and can mitigate the Democrats' advantage in voter mobilization.

"The defining feature of this presidential election," Professor Green said, "is the focus on voter mobilization."

Because they may not expressly advocate for specific candidates or coordinate with any candidate's campaign, many 527s are used to raise money to spend on issue advocacy and voter mobilization.

Moran also oversaw EMILY's List's first foray into voter mobilization in 1994.

The draft also contains other provisions, like rules that would change how some groups pay for advertisements and voter mobilization using a mix of hard and soft money.

Fowler's newest research focuses on Facebook friendship as a predictor of voter mobilization, and the use of the social network medium, to mobilize voters in American elections.