SELECT prog_cons FROM table_name_63 WHERE polling_firm = "corporate research associates" AND liberal = "31%" AND dates = "february 2009"
Menurut jajak pendapat Februari 2009 oleh Corporate Research Associates yang melaporkan 31% liberal., Apa persentase yang selaras dengan prog.Kontra.berpesta?
CREATE TABLE table_name_63 (prog_cons VARCHAR, dates VARCHAR, polling_firm VARCHAR, liberal VARCHAR)