Polling isn't swaying much towards the left. Democrats may very well get the Georgia seat, but lose control of the Senate.
Odd, the voting public seem upset with Obama, yet want to give more power back to the party that has accomplished even less than Obama. They are upset about the health insurance they didn't lose, the Ebola they didn't contract, and an economy that has created no jobs that has created millions of jobs since 2010.
Polling at this point, to my mind, suggests increased uncertainty of outcome. Georgia and Kansas seem very dicey for the GOP, and so does Kentucky. On the other hand, New Hampshire, North Carolina, Iowa, and Colorado are very dicey for the Dem's. As I have thought for months, it could be 5 to 8 Senate seat gains for the GOP, which means it is a tossup (slightly leaning GOP for control of the Senate...but only by a hair).
Finally, always remember that those who are 'upset' are those in the margin - most people will vote the way they always vote. No doubt some of those folk in the margin are those 5 to 10 percent of the voters directly affected by Obamacare, and a portion of their friends or relations so affected. Another portion may be those who have dropped out of the labor market and are not reflected in the unemployment stats. And others in the margin will be those who believed Obama was the "hope and change" guy. And finally, it is also part of those African-American tribalists that are not interested in white candidates and sit out elections where Obama is not running.
And the prior scare tactic for Democrats are failing; "The War Against Women" theme is falling flat, and the older 'Rush Limbaugh hates cripples' theme is too worn out (and the Koch brothers demonology never caught fire).