TPM:

A new lawsuit filed by the Trump campaign and the Republican National Committee seeks to block the use of drop boxes for Pennsylvania voters to submit their mail-in ballots.

The lawsuit, announced Monday, alleges that by letting voters submit their mail ballots at locations other than at their county board of elections’ offices or through the mail, election officials ran afoul of state law. It also claims that the use of drop boxes in Pennsylvania’s primary amounted to a violation of the U.S. constitution.

“Upending our entire election process and undermining ballot security through unmonitored by-mail voting is the single greatest threat to free and fair elections,” the lawsuit claims.

Not every Pennsylvania county set up drop boxes for voters, but many did, particularly as concerns grew that voters weren’t receiving their ballots in time for them to be returned by mail.

Election officials in several other states also set up mail ballot drop boxes for their spring and summer primaries, during which absentee voting skyrocketed due to the pandemic. The use of drop boxes is also common in states that had widely-used absentee voting or mail-in voting operations prior to the pandemic, and some of those states require the use of drop boxes in a way that maximizes convenience for voters.