In a Pew Research Center poll of likely voters, Mr. Obama is ahead, 50 to 44 percent, within [the baby boomer] age group.
“This is a significant change, and that generation’s vote counts for a lot,” said Scott Keeter, director of survey research for Pew. The boomers, who range in age from 48 to 66, account for 37 percent of all voters, according to Pew. Generation X — roughly 31 to 46 — makes up 26 percent. The youngest voters, ages 18 to 30, and the oldest, over 65, make up 17 percent each.
The apparent shift could be offset by a softer level of support for Mr. Obama among the youngest voters, in the 18-to-29 age group, of whom 66 percent went for him in 2008, and potentially lower turnout.
What is moving the baby boom voters? It may be Medicare.