Democrats themselves aren’t exactly challenging that narrative.
Check it out:

His poll numbers are diving, he just gave a State of the Union address that even his own supporters panned as flat, and with three years left to run the country he’s fending off the term “lame duck.”

So as Democrats fight to keep control of the Senate and make gains in the House, are they giving President Obama the cold shoulder?

Over the past six months, the president only has visited two states — North Carolina and Louisiana — where a vulnerable Senate Democrat is facing a tough race. And none of the states Obama was visiting on his latest two-day tour have Senate Democrats up for reelection in the fall.