(Yes, I know it's really 18 and I'm two days late.)
Really, not much has changed. If you look at where things were last week (Obama gaining ground, McCain losing it) this week is just an extension of those trends. With two Presidential debates and the VP debates under the voters' belts (the polls haven't quite caught up to Wednesday's debate yet), the map continues to look very blue, even if some individual states are fluctuating.
Obama holds all last week's “likely” and “lean” states, with Michigan and Pennsylvania (38 EV) moving from “lean Obama” to “likely Obama”. FL, CO, NH and VA (52 EV) move from “toss up” to “lean Obama”.
West Virginia and North Dakota (8 EV) join the toss-up states this week, with McCain leading in WV by 2.8% and in ND by just .5% Of all the current “toss up” states, Obama leads in NV, MO, OH and NC. McCain leads in ND, WV and IN.
In a troubling sign for McCain, Montana moves back into “lean McCain” and for the first time, so does Georgia (18 EV combined).
Where they stand:
Obama: Start picking out furniture and interviewing for your cabinet members. Only a major scandal or historic national event could derail the O train at this point.
The only question now is this: Does Obama focus on running up the score by campaigning for himself in tossup states and “lean McCain” states, or does he slow down and shift tactics. He could, for example start holding rallies with (but really for) close congressional candidates, even in strong red or blue states. Or, he could slowly reduce his campaign schedule and start focusing on the transition team as some have suggested.
McCain: It's probably over. If McCain can win four or five of the tossup states he can potentially avoid the election being called a “landslide”.
However, given what it might take to do that (serious $ and mud slinging), it might benefit McCain to focus on salvaging his reputation by ratcheting down the attack ads and vicious sentiment and running a more honorable and humane campaign. Like Obama, McCain may be able and better served to shift some resources and time to congressional races.
According to 270towin.com, their simulation engine shows Obama winning 99.5% of the last 1000 simulations, with an average electoral vote of 340 to McCain's 198.
If the election were held today, and every state voted according to the latest poll average, Obama would win in a landslide–364-174 electoral votes.