Laws. These elected candidates are called congress members.
The congress is also called:
In Ireland, it's known as The Dail.
In Israel, it is referred to as The Knesset.
In Japan, it is known as the Imperial Diet.
In the Netherlands it's generally (in Dutch) referred to as Tweede Kamer or Second Chamber.
In Portugal, it is known as the Assembelia da República (Assembly of the Republic).
In Estonia, they call congress Riigikogu.
In Turkey, they call congress Meclis.
The Chairman of Congress or Head of Congress usually is the leader of the Congress.