He mentions that the “R2” is 0.99 — a reference to a statistical measure referred to as the correlation coefficient. That coefficient is described with the shorthand r; r-squared, the worth shared by Abramowitz, is the coefficient of dedication, measuring how carefully the dots on that graph match the displayed line. A price of 0.99 means, in essence, that they match very, very effectively. The utmost worth is 1.
https://www.washingtonpost.com/politics/2021/10/19/what-it-means-that-state-politics-are-heavily-nationalized/?utm_source=rss&utm_medium=referral&utm_campaign=wp_politics | What it signifies that state politics are closely nationalized