This process is separate from impeachment, which starts in the House of Representatives. This is likely the first time Senate lawmakers have ever sought to remove a politician from office.
The Senate resolution involves three series of votes: The first vote, of which a simple majority is needed, is whether to hold a hearing in a joint session. The next establishes the rules of this hearing. The final vote, once a hearing has been held, requires a two-thirds vote in order to petition the governor to take action and remove her.