SEAN TRENDE AND DAVID BYLER: The GOP Is the Strongest It’s Been in Decades.

Overall, this gives the Republicans an index score of 33.8. This is the Republican Party’s best showing in the index since 1928, and marks only the third time that the party has been above 15 in the index since the end of World War II. You can see the full trend, taken back to 1928, here. . . .

Obviously, this interpretation is at odds with the prevailing theme of a Republican Party with serious demographic problems. One can argue that these problems make it difficult for the GOP to win the presidency. But those same shifts have strengthened it in the states, which is where most lawmaking takes place.

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