ABC News' Devin Dwyer ( @devindwyer) reports: Employees of Goldman Sachs, once among the top financial backers of Barack Obama, donated overwhelmingly to Republican presidential candidate Mitt Romney in the second quarter, according to a computer analysis of FEC data conducted by Bloomberg. Romney collected $238,250 from the Wall Street bank's employees between April and June. Obama netted $10,113 in the same period. Goldman donors were Romney's single biggest source of corporate support, Bloomberg found. The former Massachusetts governor raised $18.3 million in the second quarter, the most of any GOP candidate. Obama raised $46 million. In the second quarter of 2007, the picture was much different: Goldman employees donated $994,795 to then-candidate Obama, while giving just $234,275 to Romney, according to the Center for Responsive Politics. A spokesman for the Obama campaign did not have any comment on Bloomberg's findings.