According to data collected by the Public Interest Legal Foundation (PILF) from the Clark County Election Department, a total of 223,469 mail-in ballots sent to registered voters for the June 9 primary election ended up bouncing as "undeliverable" — 17 percent of the total 1,325,934 mail-in ballots that were sent out in the county.

"These numbers show how vote by mail fails," PILF President J. Christian Adams said in a statement, adding:

New proponents of mail balloting don't often understand how it actually works. States like Oregon and Washington spent many years building their mail voting systems and are notably aggressive with voter list maintenance efforts. Pride in their own systems does not somehow transfer across state lines. Nevada, New York, and others are not and will not be ready for November.

For comparison, in the 2012, 2014, 2016, and 2018 general elections, the entire state of Nevada recorded just 5,863 mail-in ballots as "undeliverable." That data comes from U.S. Election Assistance Commission surveys.