John: Nate Silver’s FiveThirtyEight model is giving Democrats a real chance to defend and expand our Senate majority this November — saying “the environment is clearly shifting towards Democrats.”

But we can’t get complacent. After Mitch McConnell and his allies began pouring millions of dollars into attack ads, polls show us neck-and-neck in top races like Arizona, Nevada, and Wisconsin.

We only have a few weeks to make a difference in our battleground states. Please, rush a donation now to help us Defend the Senate >>