A year after its founding, Democratic Alliance has become a major power in the liberal movement, directing more than $50 million to liberal think tanks and advocacy groups in a campaign to better compete against conservatives. The Alliance was formed last year with major support from billionaire George Soros and software mogul Tim Gill. The identities of its members are closely guarded, but the group now includes nearly 100 of the nation’s wealthiest political contributors, the Washington Post reports. The group was organized, according to its founders, in the belief "that Democrats became the minority party in part because liberals...