Harry Enten: “Obama’s overall approval was 50.8%… in the month before election, but it has decreased by 5.1pt, to 45.7%, since July. The decline, it turns out, can mostly be ascribed to younger voters.”
“Compared to his average approval a month before the election, Obama’s approval rating since the beginning of July has dropped 9.3pt, to 52.3%, among 18- to 29-year-olds. His approval among 30- to 49-year-olds has dipped by 5.7pt, to 45.5%.”
“His approval among those older than 50 has stayed relatively stable comparatively. He’s only down to 1.5pt among 50- to 64-year-olds, and 2.7pt among those older than 65. Indeed, his approval with 50- to 64-year-olds has actually been 0.2pt higher than among 30- to 49-year-olds.”

