Surprise! Mitt Romney probably drew much support from his infamous 47%. As the Times reported, 56% of the over-65 demographic voted for Romney. Why would a group dependent on Social Security and Medicare vote for a team eager to curtail those programs?
Ignorance, in part. (A poll of Ohio Republicans by Public Policy Polling found that 1 in 7 of them credited Romney with Osama bin Laden's killing.) But I think there's an even more powerful force: tradition.
Whites voted Republican in nearly the same ratio as seniors both in 2012 and 2008. The senior vote looks to be impacted by a committed white Republican constituency getting older but still committed — even if it means voting against its own welfare.