UPDATE: Tennessee's embattled House speaker has announced he'll resign from his leadership position on Aug. 2 after a vote of no confidence by his Republican caucus amid a scandal over explicit text messages.

READ MORE | UPDATE: Tennessee House speaker to resign  

The move is unprecedented in Tennessee's modern political era. The last speaker resignation came in 1931 in the Senate.

READ MORE | Dems call for special investigation into House Speaker Casada 

House Speaker Glen Casada announced Tuesday that he's asking Gov. Bill Lee to call lawmakers back for a special legislative session to elect a new speaker on the day he steps down.

Lee has said he would consider calling a session should House leadership ask for one.

Casada has been dogged by calls to resign since it was revealed he exchanged text messages containing sexually explicit language about women with his former chief of staff several years ago, among other controversies.

Copyright 2019 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.