Some might argue that the legislative record should be a factor for voters' assessment of the legislature.
This doesn't really matter. People probably have no idea what the economies of other countries are like. Why should they?
The issue of the economy is discussed in the article, economic conditions have clearly not been amazing for the majority of Biden's presidency.
That's a mistake. The point should be about winning the popular vote, not the election. As the Faris article notes, "in 2016, Hillary Clinton
led Donald Trump by 3.4 points, according to the RealClearPolitics average, in a race she ultimately won nationally by 2.1 percent."
The broader point is that polls have some predictive value at this stage of the election.