The Paul Ryan budget plan is deeply unpopular.
And it could cost the U.S. economy millions of jobs.
Nate Silver calculates that Ryan is the most conservative Republican member of Congress to be picked for the vice presidential slot in more than 100 years.
Under the tax plan Ryan proposed in 2010, Mitt Romney would pay less than 1% in income taxes.
Here's a look at some of Paul Ryan's other plans.