These shifts were not outside the margins of error in the Reuters/Ipsos and Echelon Insights surveys, while the Times’s pollsters said that they could not calculate such a margin for their recontacting survey. Nevertheless, the fact that the same shift was recorded across three different surveys lends credence to its validity.
I’ve heard it’s like a 2% change? That’s within the margin of error of most polls.
It’s noise. Random fluctuation.