Progressive activists played a big role in helping President Obama get elected. But in the years since, the big story of political activism has been the conservative Tea Party movement.<snip>"It has been a tough couple of years," says activist Van Jones, who served briefly in the Obama administration. "We can't get up here and lie like everything's cool. We went from hope to heartbreak in about a minute."Jones was forced to resign from the administration in its first year amid criticism from conservatives over controversial statements he'd made in the past.While calling the Tea Party's ideas wrong for America, Jones...