McKibben says he's encouraged by the growth of grassroots activism around the globe, especially among young people.

VOA: standard.2010.04.21

One fast-growing grassroots organisation is Working America, an affiliate of the AFL-CIO which links union members and non-union workers to campaign for better jobs, higher standards in education and, above all, health-care reform. (Any progress on this front under the Obama administration will be claimed as a success by both AFL-CIO and the breakaway coalition led by Mr Stern.) Moreover, grassroots union activism in several swing states helped Mr Obama to victory.

ECONOMIST: Unions

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'?