He may not have a college degree, but Wisconsin Gov. Scott Walker is at the head of the class among possible 2016 Republican presidential candidates, according to a new Fox News poll. In a survey that asked respondents to assign letter grades to 10 Republicans who may mount a campaign, Walker received an average grade of “B.” Retired neurosurgeon Ben Carson and U.S. Sen. Marco Rubio, R-Fla., both received “B-” averages.

No potential 2016 presidential candidate on the Democratic side received an average “A” grade either. Former Secretary of State Hillary Clinton’s average grade was “B+,” while U.S. Sen. Elizabeth Warren of Massachusetts and Vice President Joe Biden both received a “B-” average, according to the poll. About 40 percent of respondents gave Clinton an “A,” another 40 percent gave her a “B,” 13 percent gave her a “C,” 3 percent gave her a “D,” and 2 percent gave her an F.

Besides leading the Republican field in average grade, Walker also received the highest share of “A” grades among Republican voters at 18 percent. He was followed by Carson at 15 percent and former Arkansas Gov. Mike Huckabee at 12 percent. Ohio Gov. John Kasich got the lowest percentage of “A” grades among the 10 possible GOP candidates at 5 percent, while New Jersey Gov. Chris Christie got the highest percentage of “F” grades at 13 percent.

The poll also found that about half of respondents think a Republican will win the 2016 presidential election while 35 percent said a Democrat will win. When Clinton’s name was specifically mentioned, she didn’t do much better. Only 38 percent said she would win, while a plurality of respondents (47 percent) said an unnamed Republican candidate would beat Clinton.

The first primaries and caucuses in the 2016 race are less than a year away, and voters are split as to whether they are enthusiastic about the upcoming contests. About 47 percent said they were dreading the start of the 2016 presidential campaign, while 44 percent said they’re looking forward to it.

The Fox News poll of 1,044 registered voters was conducted between Feb. 8 and Feb. 10. It has a margin of error of 3 percentage points.