GOP floods cash into 39 House races once deemed safe as internal polls show vulnerability

Republican groups and megadonors have begun spending in at least 39 US House races previously considered safe, following internal polling that showed unexpected vulnerability ahead of the November 3 election. The shift marks a defensive posture in districts the party had assumed were secure, signaling a broader competitive landscape than initially expected. The move could indicate a tightening national environment or specific local weaknesses, though the exact drivers remain unclear.