Reformers to force House vote on campaign finance bill.(Chicago Tribune)

WASHINGTON _ After languishing in Congress for six months, campaign finance legislation was resurrected Thursday as supporters mustered enough allies to force a House vote on the measure.

The proposal to stop the unlimited flow of money into politics received the final four signatures needed to validate a Democratic-sponsored petition that had been circulating on Capitol Hill for months. If the bill survives a tough floor battle, it could create the most dramatic changes in political financing laws since the Watergate scandal of the 1970s.

The legislation seeks to curb unlimited contributions, known as soft money, given to political parties and groups. The contributions have come under renewed fire with the collapse of energy giant and major …