A prominent Philadelphia attorney and Hillary Clinton supporter filed suit this afternoon in the U.S. District Court for the Eastern District of Pennsylvania against Illinois Sen. Barack Obama, the Democratic National Committee and the Federal Election Commission. The action seeks an injunction preventing the senator from continuing his candidacy and a court order enjoining the DNC from nominating him next week, all on grounds that Sen. Obama is constitutionally ineligible to run for and hold the office of President of the United States.