CNN Poll: Biden continues to lead crowded Democratic field
By Jennifer Agiesta
Plagiarism charge hits Biden climate change plan
By Natasha Korecki & Zack Colman
Joe Biden embraces Green New Deal as he releases climate plan
By Dino Grandoni & Jeff Stein
Joe Biden's climate plan targets net-zero emissions by 2050
By Eric Bradner & Arlette Saenz
Joe Biden's evolution on abortion, explained
By Anna North