“When I return to town on June 3, I will meet with caucus leadership to determine the best date for me to resign as speaker so that I can help facilitate a smooth transition," Casada said in a statement.
Casada represents House District 63, an eastern segment of Williamson County including parts of Franklin, Brentwood, Nolensville and Thompson's Station.
The move comes after Casada's alleged participation in inappropriate text messages with his former chief of staff, Cade Cothren, as well as the aide's admission that he had previously used illegal drugs in the legislative office building. The House Republican caucus voted to signal "no confidence" in his leadership on Monday, May 21.
Casada has not resigned from the legislature. Rep. Bill Dunn, R-Knoxville, is next in line to take over as Speaker of the House should Casada resign.