宪法第一条第四款说的是州负责制定manner,就包括了如何核对选民身份。国会有权通过立法修改，但行政部门无此权力。

The Times, Places and Manner of holding Elections for Senators and Representatives, shall be prescribed in each State by the Legislature thereof; but the Congress may at any time by Law make or alter such Regulations, except as to the Places of chusing Senators.