Clinton is at 49 percent in the new poll, up nine points from the December survey, with Obama at 36 percent, which is a six-point gain from his December standing.
Obama finished first in Iowa's Democratic caucuses. Clinton won in New Hampshire.
"Clinton has re-established herself as the Democratic front-runner, especially among Democratic women," Schneider said.
Former Sen. John Edwards of North Carolina is a distant third, at 12 percent, with Rep. Dennis Kucinich at 1 percent. The sampling error for the Democratic results is plus or minus 4.5 percentage points.
A national poll is more telling on the Democratic side, because we already know that Super Tuesday will be the focus, the "national primary". Interesting, that both Clinton and Obama have gained support, as the other candidates drop out. In the poll internals, we have this tidbit:
Suppose the only Democratic candidates were Hillary Clinton and Barack Obama. Which of those
two would you support?
Neither (vol.) 3%
No opinion 1%
With Edwards eliminated, Obama picks up 2/3rds of his support.
On the Republican side, McCain's rise is staggering, a combination of momentum and Guiliani fading badly:
McCain has the support of 34 percent of registered Republicans in a CNN/Opinion Research Corp. survey out Friday. That's a 21-point jump from the last CNN/Opinion Research poll, taken in December, well before the Iowa caucuses and New Hampshire primary earlier this month.
Former Arkansas Gov. Mike Huckabee, who won the Iowa Republican caucuses, is in second place in the new survey, with 21 percent of those registered Republicans polled supporting him for the GOP nomination.
Rudy Giuliani follows with 18 percent, a drop of six points from the December poll, when the former New York City mayor was the front-runner.
"Only McCain gained support among Republicans nationally. McCain's now the clear Republican front-runner," said Bill Schneider, CNN senior political analyst.
Former Massachusetts Gov. Mitt Romney is in fourth place, with the backing of 14 percent of registered Republicans, with former Sen. Fred Thompson of Tennessee at 6 percent, Rep. Ron Paul of Texas at 5 percent, and Rep. Duncan Hunter of California at 1 percent.
The GOP race is still wide open, with critical contests looming Michigan and South Carolina. That fact makes this national poll less predictive than the one for the Democrats, but that said, McCain is clearly emerging as the frontrunner.
Guiliani's Florida strategy is imploding fast, just today he was forced to hold the pay for staff. McCain is benefiting from Guiliani's decline, and a new Florida offering demonstrates the folly of sitting on the sidelines for so long. Guiliani's once solid lead is gone: