Good evening, just moments before the third Democratic debate begins tonight.

We're learning the strategies for some of the 10 candidates sharing the stage.

This third debate actually, a first in a number of ways, it's the first time all the qualifying

candidates will be on one stage.

It's the first time all three front runners will be on the debate stage.

And the first time the leader, Joe Biden, will face the surging second place candidate,

Elizabeth Warren.

My tax are expected, but from whom and against whom.

And will they have a lasting or just fleeting effect?

Now in the last few hours, sources from inside and number of the campaigns have begun to

talk about what we can expect tonight.

So before we get to our political team for analysis, I want to check in with our chief political

correspondent, Dana Bash, who is in Houston at the third debate.

So Dana, let's talk strategy.

What's the vice president thinking going into this or his team?

I spoke to a senior Biden advisor who's involved in debate prep before coming on with

you tonight.

We said a couple of things.

What we've been hearing from the Biden camp today, which is the notion that he's going

to push that there is a difference between plans and getting things done.

You can't have change if you can't actually implement it.

Now, when you think plan, you think Elizabeth Warren.

...