Sometimes people click when they didn't quite mean to or maybe change their opinion. Perhaps persuasive comments in the thread or other factors means they change their mind. However, seems there's no way for a user to undo or 'unvote' for an idea they previously liked(?).
Please could you allow a user to toggle their vote on / off, via a second click?
Thank you for your idea. Once the vote button is clicked, it changes to "Voted." If you then click the button again, the vote will be removed.