Sacks’ prediction had three testable components: (1) Republicans would take the U.S. House in the 2022 midterms, (2) this would be described as a GOP ‘red wave’, and (3) Nancy Pelosi would shortly announce her retirement from Congress and/or from House leadership after that loss.

1. Republicans did win the House in 2022. Democrats went into the midterms with a narrow House majority and came out with Republicans holding 222 seats to Democrats’ 213, flipping control of the chamber. (en.wikipedia.org)
2. However, the scale of GOP gains fell well short of pre‑election expectations; post‑election analysis across the political spectrum commonly referred to 2022 as ‘the red wave that wasn’t’, emphasizing that Republicans secured only a small net gain of House seats and failed to win the Senate. (en.wikipedia.org) So the magnitude implied by calling it a red wave was wrong, even though the House did flip.
3. Pelosi did announce she was stepping down from House Democratic leadership very shortly after the GOP’s House win became clear. On November 17, 2022—one day after outlets projected that Republicans would narrowly take the House—she stated on the House floor that she would not seek reelection to Democratic leadership in the next Congress, while remaining in Congress as a rank‑and‑file member. (cnbc.com) She did not announce retirement from Congress itself until November 2025, when she said she would not seek reelection in 2026. (washingtonpost.com)

Given the normalized formulation allows for retirement from Congress and/or House leadership, the core of Sacks’ forecast—that Democrats would lose the House in 2022 and Pelosi would soon step down from House leadership afterward—did occur on the predicted timeline. The only clearly incorrect element is the characterization of the overall election as a large ‘red wave’. On balance, that makes the prediction substantively right, though somewhat overstated in tone.