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.
Hillary Clinton leads all Democrats with 42% of the public saying they have heard the most about her in the news lately.
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.