The coalition of progressive youth and environmental justice groups are confident they can help give the presumptive Democratic nominee a needed edge with the base, even as the Trump team seeks to paint her as a radical.By Marianne Lavelle, Keerti GopalVice President Kamala Harris has captured the support of a key coalition of progressive, youth-led and environmental justice-focused climate advocates, with the Green New Deal Network slated on Wednesday to announce its endorsement of her candidacy.