根据海琦法案，总统副总统可以助选。请复习 Hatch Act of 1939。

The Hatch Act of 1939, officially An Act to Prevent Pernicious Political Activities, is a United States federal law whose main provision prohibits employees in the executive branch of the federal government, except the president, vice-president, and certain designated high-level officials of that branch,^[1] from engaging in some forms of political activity. The law was named for Senator Carl Hatch of New Mexico. It was most recently amended in 2012.