How can you not love a poll that uses something called a "feeling thermometer"?
In any case, this national poll was conducted Jan. 4-7 by Quinnipiac. They ask respondents to give a "warmth" temperature of 0 to 100 to gauge how favorably they view each potential presidential candidate. Basically, they're giving a favorability number that's continuous, rather than yes/no.
Here's the poll question:
http://www.quinnipiac.edu/institutes-and-centers/polling-institute/national/release-detail?ReleaseID=1994Among all voters….
Christie 55.5
Huckabee 51.0
Warren 50.7
Jindal 49.6
Kasich 49.5
Walker 49.2
Clinton 48.5
Rubio 47.1
Paul 47.1
Ryan 46.7
Bush 45.1
Cruz 43.9
Biden 45.1
Cuomo 43.0
O'Malley 42.1
Perry 41.2
Santorum 41.0
Schweitzer 40.6
Peter King 39.7
Howard Dean 37.2
Of course, not a perfect comparison, because different candidates have different levels of name recognition. The candidates that prompted the fewest "I don't know" responses (and therefore the best known):
Clinton 2%
Biden 7%
Christie 17%
Ryan 18%
Bush 18%
The most "I don't know" responses (and thus, the least well known candidates):
Schweitzer 82%
O'Malley 77%
Kasich 68%
King 66%
Walker 57%
What about candidate "warmth" among members of their own party?
Dem. warmth among Democratic voters:
Clinton 77.2
Warren 73.9
Biden 66.9
Cuomo 58.6
Dean 53.0
O'Malley 49.1
Schweitzer 44.6
Rep. warmth among Republican voters:
Huckabee 74.9
Walker 69.9
Cruz 69.5
Ryan 69.0
Rubio 65.8
Jindal 65.2
Paul 63.6
Bush 63.6
Santorum 61.4
Christie 58.6
Kasich 57.8
Perry 56.6
King 49.4