A congresswoman or congressman: an elected official who serves in the House of Representatives, the lower house of the United States Congress. "Congresscritters" can also, loosely, include U.S. Senators. The term is gender-neutral, and also attempts to remove these elected representatives from their pedestals.
"Writing to your congresscritters about an issue may seem pointless, but when enough people -- you and your friends and their friends and THEIR friends -- make their voices heard, the congresscritters will realize that their chances of reelection ARE affected by doing the right thing."