A tied race here wouldn't really be surprising at all. For one thing, Sinema was only up 4 during the fierce and divisive Republican primary. Secondly, she's an awful massively overrated candidate and has been running an awful massively overrated campaign, like I've been saying for months now. McSally on the under hand has been underrated and running a great campaign. People expected her to struggle against Ward and Arpaio, but she destroyed them with ease, getting a majority of the vote in the process and even outperforming McCain. Now she's running scathing attacks on Sinema and hitting her where it hurts while Sinema does nothing but run the same moderate hero ads she's been running for the past year. Yawn.
Sinema is lucky the political environment is so good for Dems that it could drag her over the finish line still. LOL at the posters and pundits that thought AZ was more likely to flip than NV because of "muh weak Rosen and McSally, muh strong Sinema and Heller, muh 6 month early polls."
*rolls eyes so hard they fall out of my skull*
The "Rosen is a weak candidate" strawman has been beaten into the ground so much it's not even funny.
Also Rosen is a mediocre candidate, although she's better than Sinema (who is godawful).