America's 16th president was rated its greatest, a new survey of political scientists showed. Its 45th - and current - U.S. president came in at the bottom of the list of the country's leaders.

The 2018 Presidents and Executive Politics Presidential Greatness Survey was based on 170 usable responses from current and former members of the American Political Science Association's presidents and executive politics section. Participants were asked to rank presidents on a 0-100 scale, with zero being failure, 50 being average and 100 being great.

The rankings are tinged with partisanship, however. About 57 percent of responders said they were Democrats, compared to 30 percent who said they were independents or "other," and 13 percent who were Republicans.

The top seven finishers on the list were identical to 2014, the last time the survey was conducted:

Abraham Lincoln George Washington Franklin D. Roosevelt Theodore Roosevelt Thomas Jefferson Harry Truman Dwight Eisenhower

Greater changes were seen in the next set of rankings.

Barack Obama was rated as the eighth greatest president, up from 18th in 2014. Ronald Reagan improved from 11th to 9th and Lyndon Johnson from 12th to 10th. Bill Clinton fell from 8th in 2014 to 13th in the current survey.

The rest of the list includes:

Barack Obama Ronald Reagan Lyndon Johnson Woodrow Wilson James Madison Bill Clinton John Adams Andrew Jackson John F. Kennedy George H.W. Bush James Monroe William McKinley James K. Pol U.S. Grant Howard Taft John Quincy Adams Grover Cleveland Gerald Ford Jimmy Carter Martin Van Buren Calvin Coolidge Rutherford Hayes George W. Bush Chester A. Arthur Benjamin Harrison Richard Nixon James Garfield Zachary Taylor Herbert Hoover John Tyler Millard Fillmore Warren Harding Andrew Johnson Franklin Pierce William Harrison James Buchanan Donald Trump

Trump was given a score of 12.34 and comes in after Buchanan, who failed to prevent secession and the Civil War, and Harrison, who died after only a month in office.