Apparently the most important issue is not the unsustainability of deficit spending, lack of fiscal responsibility, or the tough problems of balancing expensive bailouts with expensive defaults. It is making sure the timing of a Greek default does not negatively affect Obama's re-election. From the Independent (UK) entitled, "Obama asks eurozone to keep Greece in until after election day"
American officials are understood to be worried that if they decide Greece has not done enough to meet its deficit targets and withhold the money, it would automatically trigger Greece's exit from the eurozone weeks before the Presidential election on 6 November.
They are urging eurozone Governments to hold off from taking any drastic action before then – fearing that the resulting market destabilisation could damage President Obama's re-election prospects. European leaders are thought to be sympathetic to the lobbying fearing that, under pressure from his party lin Congress, Mitt Romney would be a more isolationist president than Mr Obama.