Not too surprisingly, there won’t be much doc block on MSNBC tomorrow, or Olympics.

Instead, the network will be live from 6amET-10pmET, “in preparation for the announcement of Senator Barack Obama‘s running mate.” We tend to think that will already have happened.

Alex Witt anchors an hour to start the morning, followed by a five-hour Morning Joe until NoonET. Chris Matthews and Keith Olbermann appear in the daytime and at night, as do Andrea Mitchell and David Shuster.

(CNN and FNC will also be live as usual.)

Click continued to see the full schedule…

NEW YORK – August 22, 2008 – MSNBC will present special live coverage from 6:00 am – 10:00 pm ET on Saturday, August 23rd in preparation for the announcement of Senator Barack Obama’s running mate. The schedule is as follows:

6:00 am – 7:00 am ET: MSNBC Live, Alex Witt anchors

7:00 am – 12:00 pm ET: “Morning Joe”*

12:00 pm – 1:00 pm ET: MSNBC Live, David Shuster anchors

1:00 am – 4:00 pm ET: MSNBC Live, Chris Matthews and Keith Olbermann anchor

4:00 pm – 5:00 pm ET: MSNBC Live, Andrea Mitchell anchors with analysis from Chuck Todd

5:00 pm – 7:00 pm ET: MSNBC Live, David Shuster anchors

7:00 pm – 8:00 pm ET: “Hardball With Chris Matthews”

8:00 pm – 9:00 pm ET: “Countdown with Keith Olbermann”

9:00 pm – 10:00 pm ET: MSNBC Live, David Shuster anchors