In a functional version of America, Congress has the “power of the purse” and controls funding for federal programs, even departments of the executive branch, like DHS.

In a functional version of America, making a threat like this would result in instant impeachment and removal.

In a functional version of America, the chief executive would have the grade school level knowledge of civics which includes the fact that the states control all election procedures for their residents. And then the states provide the results of said elections to the federal government. The federal government plays no role in those elections (except maybe in DC?) outside the scope of the federal election commission (which is an independent agency.)

But alas, we are not living in a functional version of America.