Interesting how many posters here have obviously answered that question shooting from the hip, without reading the linked article by Nader or even the OP.
I think Nader is, as usual, well worth reading. Key point:
"There are answers that are more specific to account for the large election losses in 2010, the loss of the House of Representatives to John Boehner and Eric Cantor, and the prospect of losing the House and the Senate this November. Chief among them is that the two parties are vigorously dialing for the same commercial dollars to finance their campaigns. The resultant inhibitions and self-censorships bring the parties' real agendas closer together, erasing the bright lines that make elections clearer choices for voters."
Absolutely. The GOP has gone so far off the deep end that not only Obama but in all the Congressional races, too, the Democrats SHOULD beat them in a landslide. If they don't, it's nobody's fault but their own -- and the above is exactly why.