If the US does less data gathering (balloon starts, buoy maintenance, setting up weather huts in super remote sites, etc.) it will affect all forecasts.

Models all use a "current world state" of all sensors available to bootstrap their runs.

Similar thing happened during the beginning of Covid-19: they are using modified cargo/passenger planes to gather weather data during their routine trips. Suddenly this huge data source was gone (but was partially replaced by the experimental ADM-Aeolus satellite - which turned out to be a huge global gamer changer due to its unexpected high quality data)