As a showdown looms in Congress over whether to raise the federal debt ceiling, AARP Arizona is among the groups voicing concerns about the future of Social Security and Medicare. Dana Marie Kennedy, state director of AARP Arizona, said they are programs Arizonans have paid into and now depend on for their livelihoods. Despite leaders in both parties insisting Social Security and Medicare are "off the table," she said some Republican lawmakers are still eyeing trimming these programs to address budget concerns. ...