Unpack the following political metaphors by giving their literal content:
1. We can't afford a president who needs on-the-job training.
2. It's time for people on the welfare wagon to get off and help pull.
3. If you can't stand the heat, get out of the kitchen.
4. We need to restore a level playing field.
5. The special interests have him in their pockets.
6. He's a lame duck.