Paul Ryan is the best and smartest choice for Romney, who hasn't been able to get republicans to fall in love with him. They will loooooooooooove Ryan. So will the media. His youth and big blue eyes. You know how the media gets.
This election will be about turn out. Republicans will want to vote for Ryan more than Mitt. Ryan shouldn't be underestimated.
Read the New Yorker's lengthy profile of Ryan.