It is estimated that only 32% of GOP emails made it into the intended recipients and donors and the rest were delivered to spam.

Google's practice of filtering Republican campaign emails into spam filters cost the party $2 billion in donations since 2019, GOP lawmakers and the head of the Republican National Committee said.

Republicans made the calculation based on a North Carolina State University study that found Google, the nation's largest email platform, flagged more Republican campaign emails as spam than Democratic emails during the 2020 election season, and ended up sending as few as 32% of GOP emails to inboxes.

"Big Tech has been silencing conservative voices and actively working against Republicans for multiple cycles," Republican National Committee Chair Ronna McDaniel, National Republican Senatorial Committee Chair Rick Scott and National Republican Campaign Committee Chair Tom Emmer said in a joint statement.