(CNN) - It's a mixed bag for a Republican 2016 favorite in New Hampshire, according to a new survey of registered voters in the state.
The WMUR Granite State poll also indicates Hillary Clinton leading the potential Democratic presidential pack but her popularity has fallen slightly over the past few months.
Fifty-nine percent of voters in New Hampshire would choose Clinton if the Democratic Party's primary were held today. She's followed by Vice President Joe Biden at 15%. Eight percent would pick progressive darling Sen. Elizabeth Warren of Massachusetts, and 5% favor Sen. Bernie Sanders, an independent from Vermont.
None have announced candidacies.
In January, Clinton brought in 73% support among Democrats and Democratic-leaning independents, according to a Washington Post/ABC News poll.
But, in Thursday's survey, only 13% of Democratic respondents says they've definitely made up their minds about 2016, and 77% said they're still trying to decide.
New Hampshire GOP favorite still up in the air
Republican voters in New Hampshire have anything but a clear-cut GOP nominee in mind.
New Jersey Gov. Chris Christie leads other potential GOP White House contenders at 19%. He's followed by Sen. Rand Paul of Kentucky at 14% and former Florida Gov. Jeb Bush at 11%. Sen. Marco Rubio of Florida and 2008 GOP presidential candidate Mike Huckabee tie in the poll at 8%.
All of the potential Republican candidates have made visits in recent months to the early voting state.
But what if...
The WMUR poll found that if 2012 GOP presidential nominee Mitt Romney were to jump in the race, he would be the overwhelming frontrunner for Republicans in the state.
Thursday’s results echo findings from a Suffolk University/Boston Herald survey conducted last month showing the former Massachusetts governor as the leading conservative in the state. In both polls, no potential candidate but Romney breaks into the double digits.
But, of course, that's all very hypothetical as Romney’s repeatedly said he’s not running for president again.
The WMUR Granite State poll was conducted from June 19 through July 1 among 889 adults contacted by phone. Among the overall sample there were 257 likely Democrats and likely 251 Republican voters. The survey has a sampling error of plus or minus 6.9 percentage points.
CNN's Paul Steinhauser and Steve Brusk contributed to this report.