IMHO, he has missed a great chance to “broaden the base” via picking Rubio.
The US Hispanic community is split. On some things, very conservative (traditional Catholic values, for example) on the other, well over on the Liberal (American Social Liberal, not European Traditional Liberal that is more like US Libertarian) side.
With a Rubio “pick” he could have moved a larger portion of the “minority” vote into the Republican camp (likely for generations to come). Via picking Ryan, he is largely picking a “mirror of himself”. Two “white guys” both being slimed on the same points. Narrowing the appeal and sharpening the attack at the same time.
Democrats are out already attacking Ryan based on his “philosophy” being based on “an atheist writer” Ayn Rand and playing the “destroy Medicare” card. Oddly, also asserting that he is “like Sara Palin” and “never had a real job outside of government” (despite his early work years at regular jobs).
Instead, we could have been treated to the spectacle of Democrats trying to slime a Hispanic… Alienate the whole group in the process. Romney really needs someone who understands hardball Chicago Politics on his advisor team.