House Rules of Order - Is McCarthy a Majority Leader?

Let's say McCarthy ends up being majority leader. Is it the kind of thing where if we get a bill passed in the Senate, McCarthy can even keep it from coming up for debate at all? And so you cannot delay indefinitely. You can always make a motion for the previous question. That's the Roberts Rules of Order term for, I am going to call for a vote right now. It is always in order, except under certain bizarre circumstances.