That link says he is registered Republican
/pol people bragging they changed it to REP
Here is perp’s alleged twitter: https://twitter.com/hardrock2016
NOTE it’s mostly retweets (?)
Under Roberts Rules of Order, a member voting in the ^winning side^ of a question can petition the chair for reconsideration and change his/her vote as long as it occurs within the same session.
The chair may or may not allow that change.
Smart parties always have one “stealth vote” on cententious issues.