This is not really a political question as much as someone who may know more about how the Legislative branch works.

The Senate is held by a slim majority by Democrats. I understand that means the heads of the various committees are Democrats.

But with Teddy Kennedy and Robert Byrd being ill, that majority has shifted.

Or not? I guess both still hold their seats until the unmentionable happens?

Is the seat then appointed by the governor of the state?

Just curious...