NPR:

Two weeks after Trump officials said they had found more than 250,000 non-U.S. citizens on voter rolls in just four states, election officials are still struggling to understand where the numbers came from, and what the claims may portend for federal interference in this year’s midterms.

Multiple state officials told NPR they fear these unverified numbers, or similar ones unveiled closer to the general election, could be used as pretext for warrants to allow law enforcement to interfere in vote-counting. Several reviews in recent years have found that actual voting by noncitizens is extremely rare.

The Department of Homeland Security, which oversaw the voter roll analysis of four states — California, Nevada, New Jersey and Pennsylvania — asked the states to respond to its allegations by Thursday. But the agency has not explained its methodology or provided the states with clarity on how it came to its conclusions…..