CREATE TABLE table_65503 ("President" TEXT, "Schl. 1948" TEXT, "Schl. 1962" TEXT, "M-B 1982" TEXT, "CT 1982" TEXT, "Siena 1982" TEXT, "Siena 1990" TEXT, "Siena 1994" TEXT, "R-McI 1996" TEXT, "Schl. 1996" TEXT, "C-SPAN 1999" TEXT, "WSJ 2000" TEXT, "Siena 2002" TEXT, "WSJ 2005" TEXT, "Times 2008**" TEXT, "C-SPAN 2009" TEXT, "Siena 2010" TEXT, "USPC 2011" TEXT, "Aggr." TEXT)

Who is the president when c-span 2009 is 21?
SELECT "President" FROM table_65503 WHERE "C-SPAN 2009" = '21'
SELECT "President" FROM "table_65503" WHERE "C-SPAN 2009" = '21'