Table:
text: Historical rankings of Presidents of the United States
Scholar survey results
Scholar survey results
President Schl_1948 Schl_1962 M_B_1982 CT_1982 Siena_1982 Siena_1990 Siena_1994 R_McI_1996 Schl_1996 C_SPAN_1999 WSJ_2000 Siena_2002 WSJ_2005 Times_2008_ C_SPAN_2009 Siena_2010 USPC_2011 Aggr_
James A. Garfield – – – 33 25 30 26 30 – 29 – 33 – 34 28 27 – 29 (tie)
Chester A. Arthur 17 21 26 24 24 26 27 28 26 32 26 30 26 22 32 25 32 28
Grover Cleveland 08 11 17 13 18 17 19 16 13 17 12 20 12 19 21 20 21 19
Benjamin Harrison 21 20 23 25 31 29 30 31 19 31 27 32 30 30 30 34 34 33
William McKinley 18 15 18 10 19 19 18 17 16 15 14 19 14 17 16 21 17 20 (tie)

Question: Who is the President if C-Span ranked 21st in the 2009 historical ranking of results from the Scholar Poll of Presidents of the United States?