You don’t need a Ph.D. in economics to remember the history of the last quarter-century. Bill Clinton raised taxes, and Republicans said the country would plunge into recession and the deficit would balloon; instead we had one of the best periods of growth in American history and we actually got to federal budget surplus. Then George W. Bush cut taxes, and Republicans said we’d enter economic nirvana; instead there was incredibly weak job growth culminating in the Great Recession. Barack Obama raised taxes, and Republicans said it would produce economic disaster; instead the deficit was slashed and millions of jobs were created.

We don’t actually have to argue about whether the Republican tax plan will increase the deficit, because the theory behind it has been tested again and again, and the results are obvious.
(via wilwheaton)