First I'd like to toot my own horn about my prediction of this a month or so ago ...
http://www.dailykos.com/...
and then rehash why this was the best move for Romney - and scariest for us ...
http://www.dailykos.com/...
I still think in the end that we will prevail - but at least now we have something to be concerned about. Let's face it - had Romney picked a snoozer like Portman or T-Paw, we could have eased our way into a 54-46 near-landslide, similar to 2008 (but w/o IN or NE-1 or perhaps even NC.) Now there is the concern that somehow the fresh face of the Angel of Death himself (Ryan) may be able to pull the wool over enough of the "low information" voters to close the gap in the swing states of NH, IA, CO & VA, while perhaps giving up a little in FL (which can be afforded as Romney is ahead in FL by a few points with respect to those 4 swing states), and stealing Ryan's home state of WI, leaving Obama with only 261 EV's going into those 4 swing states and FL & WI.
Of course, the opposite could happen, and we could a huge coattail effect as some of the currently committed "low information" voters decide to switch to voting for the Democrats in the Congressional races - as well as possibly dragging down the POTUS ticket enough to get the 2008 result, plus maybe even AZ (because of the scared retirees), MO & MT - and possibly even more! And perhaps even making Obama's re-election so inevitable that the hard core Tea Partiers would decide to vote for Goode (Constitutional Party), which could make it a true landslide.
All in all though, I'd prefer the safe, steady win.