TMBTM said:
There is a deleted scene where Yoda, Mace and Obi are talking about taking control and putting Palpatine under arrest or something like that.
There is a similar scene in the main movie where Mace is at a briefing holo-table with Yoda and a couple others in holo-form. Anakin has just left to inform Palpatine that Grievous is destroyed. The Jedi discuss how Palpatine needs to step down now, and they may have to remove him if he will not do it himself.