Late wave expands House battleground

A quantitative forecast can show a late‑stage expansion of districts that move from ‘longshot’ to ‘likely’ for a party, meaning a wave’s momentum often materializes in shifting probabilities rather than new structural changes. Tracking these probabilistic seat‑moves (e.g., FLIPR adding 14 seats to Likely D and cutting Likely R seats) gives a more precise view of wave strength than headline control probabilities alone. — Understanding late probabilistic seat reclassifications sharpens how journalists, campaigns, and voters estimate both the size of a wave and the durability of the resulting governing majority.