Charles Rangel ผู้ดำรงตำแหน่งมีกี่เขต?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many districts have the incumbent, Charles Rangel?It is not neccessary to use all the tables.
 table_1805191_33:  district [ VARCHAR]  incumbent [ VARCHAR] 
SELECT COUNT(district) FROM table_1805191_33 WHERE incumbent = "Charles Rangel"