Salena Zito takes a look at how Barack Obama's rising popularity is exposing Hillary's weaknesses - and why you should care:

Obama has demonstrated in just a few weeks the desire of Democrats to find an alternative to Clinton.

Former Virginia Gov. Mark Warner, who abruptly dropped out of presidential contention right before the midterm elections, enjoyed that real estate for a while. Now, Obama has basically taken whatever Warner had and doubled, tripled, even quadrupled it, in terms of enthusiasm.

Here is the nickel tour of the problems for Hillary.

Everybody knows who she is and that her last name is Clinton. That's her strength. But when you break it down, there are four very distinguishable chunks of the Democrat electorate that any candidate must win to secure the nomination; in no particular order, they are minorities, over-the-top anti-war folks, labor unions and women.

Read her early look at what may be coming, and why Hillary may not be the one to be watch for in the '08 elections, here