President Trump has announced plans to mandate voter ID for the upcoming midterm elections, saying he would act without Congress if legislators don't move forward.

$BTC The declaration would mark a significant departure from current U.S. election law, which leaves voter ID requirements to individual states — resulting in a wide range of policies across the country.

Implementing such a requirement unilaterally at the federal level would raise immediate constitutional and legal questions, as election administration has historically been a state responsibility under the U.S. Constitution.