Obama's biggest mistake? Running for president of a very small part of this country. To be President, one must be President for ALL Americans, not just the rabids on either side.
Class warfare/envy division isn't the way either. just look who he panders to in campaign stops? Unions and college kids. He didn't have the balls to go to the NAACP and speak to them but sends a surrogate and issues a cheesy video.
When I was a kid I envied Dr J (Julius Erving). I tried to emulate his style on the court and always had good things to say about the man.
Therefore, I have to admit that saying the left envies the wealthy doesn't quite fit. I'd say those who are consistent tools for the wealthy are the ones who envy the wealthy.
Class warfare? Working Americans lost wealth, have experienced over three decades of flat wages and saw their share of the National Income shrink to record lows last year. Where as at the same time, the top percentiles saw their wealth grow and there income increase, thus the wealth gap. Class warfare? By whom?