A new poll has Bernie Sanders up 54 to 39 over Donald Trump. Meanwhile, Hillary Clinton no longer has a double-digit lead over Trump like she did just a month ago.
Bill Moyers and Michael Winship: Unless she steps down, the Democratic convention will be dominated by someone who represents everything that has gone wrong with Washington.
Zia Swim is an environmentalist, activist and engineer based in the San Francisco Bay Area. She is currently a fellow at Truthout doing development work and environmental journalism research.