State election officials could soon face a stark choice: hand over voter lists to the Trump administration or risk losing Postal Service delivery for mail-in ballots.

That dilemma stems from newly proposed USPS rules that seek to comply with an executive order President Donald Trump signed this spring to crack down on mail-in voting. If courts let the order stand, it would give the federal government an unprecedented role in elections — and could put even more voter data in the hands of Trump officials searching for supposed election fraud.