Until Obama, America had shown support for a democratic ally Israel. But now Obama, in his quest to win the love and respect of the Muslim world, has turned his back on Israel. He states a Palestinian nation must be configured based on borders before 6-day war in 1967. This flip-flops decades of American support for Israel in it's current configuration. He makes this statement in a speech 1 day before PM Netanyahu visits the White House.
source: http://biggovernment.com/jdunetz/2011/05/20/the-democratic-party-should-be-ashamed-of-itself/