It's not.
"About a year ago, the same question showed voters evenly split, with 45 percent saying they would vote for a Democrat, and 45 percent saying they would vote Republican."
About a year ago, Hillary was a shoo-in to be president. This is what SHE tweeted exactly one year ago today:
Following Scott Adams' timeline, we're barely into Phase III of the Trump Nation. We've gone through the "Trump is Hitler" phase, we're phasing through "Trump is Incompetent" and we're entering the "Trump Is Effective, But I Don't Like What He's Doing" phase.
Patience! The midterms are over a year off. No need to panic.