H.R.6611: To amend the Internal Revenue Code of 1986 to make the research credit permanent, increase expensing for small businesses, reduce corporate tax rates, and for other purposes.

Strengthen American Manufacturers Act of 2008 - Amends the Internal Revenue Code to: (1) make permanent the tax credit for increasing research activities; (2) increase to 20% the rate of the alternative simplified tax credit for research expenses; (3) make permanent the increased expensing allowance for depreciable business property; and (4) reduce to 30% the maximum income tax rate for corporations.

Directs the Comptroller General to conduct studies of: (1) the impact of workplace employee health care facilities on employee health and and productivity; and (2) the best practices for encouraging college graduates from rural areas to return to those areas after graduation.