When he takes the stage tonight in Kentucky, Joe Biden better be carrying a very large shovel. Because in addition to being a Lying Liar, Ryan isn't very bright.

Ryan is not a wonk. Yes, he likes charts and slides. But he very clearly doesn’t know what his numbers actually mean. When the famous plan was unveiled, it was quite clear that he never even realized that the Heritage projection of his plan’s impact made a completely ridiculous assertion about what would happen to unemployment. Nor did he realize that his assumptions about discretionary spending would require cutting such spending — including defense! — to levels not seen since Calvin Coolidge.

Good luck, Mr. Vice President.