Obama's personal image remains more favorable than Clinton's - and he retains a 10-point advantage over her in the race for the nomination. But certain beliefs and attitudes among older, white, working-class Democrats are associated with his lower levels of support among this group.
The public remains highly engaged in the election, with no increase in campaign fatigue. Also, with the Democratic race still in question, a Gore endorsement would be more influential than one from Edwards.
Republicans and Democrats agree the economy should be a top priority for the president and Congress, but they differ more than ever on the importance of other domestic issues -- such as global warming and health insurance for the uninsured.
The internet is living up to its potential as a major source for news about the presidential races. Nearly a quarter of Americans say they regularly learn something about the campaign from the internet, almost double the percentage at a comparable point in 2004.
Voters, especially Democrats, in two early primary states are being inundated with phone calls, mail and other campaign contacts; but so far there are few signs of campaign fatigue.
When he formally enters the 2008 race this week, former Sen. Fred Thompson can behave in all ways like a presidential candidate. But on his "testing the waters" website, I'mwithFred.com, he's already been busy reaching out to supporters.
Hillary Clinton leads all Democrats with 42% of the public saying they have heard the most about her in the news lately.
Through their official websites, the campaigns themselves are challenging the press as a destination for news.
They originate on the internet, but more people are viewing them on TV than online.
Heading into their first debate Thursday evening, what Republican candidates for the presidency need most is to gain visibility. The latest News Interest Index survey finds Clinton and Obama are far more visible, even to Republicans.