There can be little doubt that the Obama campaign skillfully used the Internet to raise funds and create and manage a grassroots organization that, in the end, carried them to the White House.

毫无疑问，奥巴马在竞选中娴熟地通过互联网募集经费，建立了一个面向群众的竞选班子，并最终得以入主白宫。

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By then Bhavarlal's sons had joined the family trade and were involved with him in grassroots marketing, making house calls on farmers.

FORBES: Magazine Article

In other words, is he going to specific congressional House districts to make a point or encourage grassroots support for the bill?

WHITEHOUSE: The White House

Should Obama choose Kaine to take control of his supporter network, Kaine stands ready to promote the vision of grassroots involvement and activism that powered Obama to the White House.

CNN: What will Obama do with his millions of online 'friends'?