Senate Banking chair Johnson cites rating agency's 'irresponsible move.'

Committee approves repealing section of Dodd-Frank.

Committee approves repealing section of Dodd-Frank.

Companies could have up to 1,000 shareholders before having to file financials.

Companies could have up to 1,000 shareholders before having to file financials.

Federal Reserve rule due to take effect in July would be postponed at least six months.

Federal Reserve rule due to take effect in July would be postponed at least six months.

Measure would postpone effective date for new regs until September 2012