Below is a list of more than 250 people whom Slate considers possible candidates for the vice presidency, from Hillary Clinton (in the Democrats' case) all the way to the darkest dark horse. As you answer the questions on the left, our tool will narrow the pool to reflect your preferences. To learn more about a candidate, click on his or her name on the list to the right.

Mouse over the yellow question marks to learn more about how we evaluated each choice.

If you find someone you really like, you can click "Nominate" in the profile box to send us an email, casting a virtual vote for that favored candidate.

Update: Scroll down or click here to see the results.

• To build this list, Slate drew on senators, governors, Cabinet members, and leaders in the House of Representatives who are either currently in office or have recently left office and remained active in public life.
• The data for each individual were drawn from a wide variety of public sources.
• To be eligible for the vice presidency, a person must be at least 35 years old and a natural-born citizen. In addition, Slate restricts this list to those younger than 80 years old. Age is calculated as of the end of 2008.
• While a running mate from the same state as the presidential candidate poses some logistical problems on that state's ballot, Slate still includes Democrats from Illinois and Republicans from Arizona on the list.
• All photos are in the public domain or used with permission. Special thanks to the National Governors Association and Callista Gingrich.