Social Security is running out of money. A former Treasury Secretary says lawmakers can't rule anything out.

The next U.S. president and this November's Senate candidates will have to deal with Social Security's funding shortfall. Former Treasury Secretary Jack Lew says lawmakers should "keep their options open" on how to fix it, rather than ruling out any solutions now. Social Security is a government program that pays monthly benefits to retired and disabled Americans. Its funding shortfall means the money it collects will not be enough to cover all promised payments in the coming years.