Table schema:
CREATE TABLE table_name_47 (republican VARCHAR, margin_of_error VARCHAR, sample_size VARCHAR, democrat VARCHAR)

Question: Who was the republican when hillary clinton was the democrat and the sample size was more than 1087 with a margin of error of 2.6?
SQL: SELECT republican FROM table_name_47 WHERE sample_size > 1087 AND democrat = "hillary clinton" AND margin_of_error = 2.6