Poll Tracker

Democrats lead Republicans among every age group of the American electorate, according to the polling firm Gallup.

A Gallup analysis of its polls between Jan. 2 and May 5 shows younger voters, between the ages of 18 and 29, tend to identify with the Democrats or to be independent. As the age increases, voters gravitate toward one political party or the other.

Also, Republicans show gains among voters approaching middle age in their 30s and 40s, and again as they reach retirement age. Even among those age groups, though, Democrats still hold the advantage.