Based on the search results, there is no information on what the Senate is voting on right now. The most recent information available is from September 29, 2023, when the Senate voted on the motion to proceed to H.R.3935, Securing Growth and Robust Leadership in American Aviation Act. However, it is important to note that the search results may not be up-to-date and the Senate may be voting on a new issue at any time. It is recommended to check official Senate websites or news sources for the latest updates on Senate proceedings.