Republicans are ramping up spending in more than three dozen US House races that were previously seen as “safe,” with internal polling suggesting some seats could be more competitive in the November 3 election. Three Republican operatives, cited by the South China Morning Post, say the party’s assessment has shifted after reviews of vulnerability in specific districts.

The change is reflected in early activity, including advertising reservations and campaign finance filings, according to the reporting. The South China Morning Post says Republican groups and major donors have begun spending in at least 39 congressional races since September 1 where they had not previously invested at comparable levels. Other outlets describe the same development as a pattern of expanded targeting rather than a single-issue or localized shift, though additional details beyond the initial reporting are limited here.