Desperate President Obama is trying to limit vote loss at the forthcoming Presidential Election. He has apparently been trying to apply pressure to Germany and France to delay the Greek exit from the EuroZone until after the US Presidential Elections.
By attempting to pressure the dithering Franco German leaders, Obama may have brought the Grexit forward.
The whole purpose of the EUSSR was to build a larger and more powerful super state that the USA and then humiliate the US at every opportunity. European leaders often act petulantly in response to US attempts to pressure them.
This may be the push required to get Merkel to make a decision and kick Greece out of the EuroZone and possibly out of the EU during the next few weeks