The National Rifle Association aired an avalanche of TV ads and pushed its 5 million-plus members to the polls for Donald Trump in 2016, propelling him in the Rust Belt states that delivered him the presidency…

With the Chamber of Commerce and Koch political network withdrawing from their once-dominant roles in electing conservatives, Republicans worry that three organizations that have long formed the core of their electoral infrastructure will be effectively on the sidelines.

The predicament has so troubled some Republicans that they are calling on the famously secretive NRA to address its 2020 plans. Within the past week, senators have privately expressed concerns about the group to National Republican Senatorial Committee Chairman Todd Young.