The Pew Research Center's polling shows a strong partisan gap in the level of political engagement. 70% of Romney supporters, but only 62% of Obama supporters, consider themselves to be highly engaged.
Romney leads Obama by a wide 8 point margin in terms of voter engagement.
Source: people-press.org
Republicans are generally more invested in the campaign than Democrats are.
Source: people-press.org
Despite being less engaged, more of Obama's suppoters claim to back him "strongly."
Source: people-press.org
And he leads Romney by seven points in the campaign.
Source: people-press.org