Lean/Lock is Slate's political predictions game for the 2010 midterm elections. In Lean/Lock, you enter your picks, update them as the election nears, and eventually "lock" in your choice when you're confident that you've picked a winner. To play, sign in with your Facebook account below:

Privacy policy:
  • We won't share your account information with anyone.

  • Your Lean/Lock picks are private. Your Facebook friends can see your three latest picks, but that's it.

  • We won't publish anything to your Facebook feed without your permission.

Preview of how Lean/Lock looks: