Donald Trump and Jenna Ellis in a photo from Ellis' Twitter account
CNN  — 

A top Trump campaign adviser and lawyer who has criticized voting-by-mail and warned without evidence that it could lead to election fraud previously voted by mail at least three times.

Jenna Ellis voted by mail in Colorado in 2012, 2013 and 2014, according to public records obtained by CNN’s KFile.

Colorado is one of five states that conducts its elections entirely by mail. The state sends a ballot to every registered voter by mail and the voter returns a cast ballot in a signed envelope to their local county clerk’s office. (Voters can also vote in person at the ballot box if they prefer.)

Multiple studies have confirmed that voter fraud is exceedingly rare, including mail voting. One in four votes in the 2018 election were cast with mail-in ballots, and a number of states are gearing up to send mail-in ballots to voters this November, citing safety concern from the coronavirus pandemic.

Ellis joins a growing list of Trump campaign and White House staffers who have publicly criticized mail-in ballots and voting-by-mail but privately cast an absentee or mail-in ballot themselves, including President Donald Trump, Vice President Mike Pence, second lady Karen Pence, White House adviser Kellyanne Conway, White House press secretary Kayleigh McEnany and campaign manager Brad Parscale.