Washington (CNN) - A new national poll adds more evidence, if it were needed, that Hillary Clinton would start out as the overwhelming frontrunner in the race for the 2016 Democratic presidential nomination, if the former secretary of state makes a second run for the White House.
And the McClatchy-Marist survey, released Wednesday, is also in line with other polls in suggesting the race for the Republican nomination, at least in this early pre-season, is a wide open contest, with no obvious frontrunner among the possible contenders.
According to the poll, 63% of Democrats and independents who lean toward the party say they would back Clinton as their presidential nominee. Vice President Joe Biden comes in a distant second, at 13%, with New York Gov. Andrew Cuomo at 6%, Maryland Gov. Martin O'Malley at 1%, and nearly one in five unsure.
Even though the next race for the White House is a long way away, there's already intense speculation over whether Clinton will make a second bid for president. When asked just before she stepped down earlier this year as secretary of state whether she was thinking of making another run for president, Clinton said, "I am not thinking about anything like that right now."
Asked in an interview with CNN later that day if she had decided against another presidential candidacy, Clinton responded that "I have absolutely no plans to run." But she added: "I am lucky because I've been very healthy. I feel great. I've got enormous amounts of energy that have to be harnessed and focused, so I'm very fortunate. I'm looking forward to this next chapter in my life, whatever it is."
And the profile on her new Twitter account, which was unveiled this spring, listed her future as "TBD," which only fueled speculation she's not finished with presidential politics.
There's also lots of speculation about Biden making a third bid for the Democratic nomination.
"I can die a happy man never having been president of the United States of America. But it doesn't mean I won't run," the vice president said in an interview with GQ magazine that was published online last week.
Governors Cuomo and O'Malley are also considered possible 2016 contenders.
The poll also asks whether Democrats and Democratic leaning independents want a nominee who will continue President Barack Obama's policies. Forty-six percent say they do, with 44% saying they want a nominee with a new vision.
The survey indicates no obvious frontrunner on the GOP side. Fifteen percent of Republicans and independents who lean toward the GOP say they would support New Jersey Gov. Chris Christie as their nominee, with Rep. Paul Ryan of Wisconsin, the 2012 Republican vice presidential nominee, at 13% and Sen. Marco Rubio of Florida at 12%.
One in ten say they would back former Florida Gov. Jeb Bush, with Sen. Rand Paul of Kentucky at 9%, Sen. Ted Cruz of Texas at 7%, Texas governor and 2012 GOP presidential candidate Rick Perry at 4%, 2012 Republican presidential candidate and former Sen. Rick Santorum of Pennsylvania at 2%, Wisconsin Gov. Scott Walker at 2% and Louisiana Gov. Bobby Jindal and New Mexico Gov. Susana Martinez each at 1%. One in four remains undecided.
According to the survey, by a more than two to one margin, Republicans and independents who lean toward the GOP say they'd prefer a nominee who stands on conservative principles rather than one who can win.
The McClatchy-Marist poll was conducted July 15-18, with 1,204 adults nationwide questioned by telephone. The sampling error for questions of Democrats is plus or minus 4.7 percentage points, with a sampling error of plus or minus 5.2 percentage points for questions of Republicans.