Social Security trustees project that, without changes, the program can pay 100 percent of benefits only through 2033. After that, the payout would drop to 75 percent.
Medicare trustees predict that money for hospital costs will be exhausted in 2024.
The health of Social Security and Medicare is of particular concern in Ohio, where 14 percent of the state's population — more than 1.6 million people — is 65 or older.
The candidates' positions on those issues were drawn from emailed responses to questions from the AARP Bulletin and from their campaign websites.
Brown said he does not support reducing benefits or raising the eligibility age for either program.
Mandel said current enrollees, along with those at or near eligibility age, should not be affected by any potential changes to the programs.
Brown: Raise the cap
Brown suggested raising the level of Social Security's cap on taxable income, which is currently $110,100.
In addition, he said, more jobs would lead to more money sent to the Social Security trust fund, helping to strengthen it. That's "one of many reasons our nation must review its trade and manufacturing policies to ensure we are positioned for success in the 21st-century global economy."
Brown recently introduced legislation to base Social Security's cost-of-living increases on retiree-specific expenses, which are higher in some categories — such as prescriptions and energy — than the current basis for cost-of-living adjustments. Brown said he would find "an appropriate offset" to pay for the change.
Mandel said government must stop diverting money meant for Social Security to other purposes.
"The first step toward reform is to end the wasteful spending in other areas of the budget," he said.
Mandel's campaign website says he advocates a cut in discretionary spending to fiscal year 2009 levels, a freeze in nondefense discretionary spending and a statutory spending limit of 20 percent of the country's gross domestic product.