Regulatory stuff doesn't really impact Big Tech's Cloud presence. I've been working closely on JWCC related RFPs and the big boys at the DoD are 100% going to push back significantly if AWS or GCP are even slightly inconvenienced. There's an internal recognition with the DoD and DHS that antitrust in the Cloud Platform Security space could lead to national security issues due to turf battles and mismanaged divestments.
And people on the Hill trying to make their mark are concentrating more on the Ad Business and Marketplace portions - those are easier wins for consumers and (more critically) small mom and pop businesses that love to participate in local politics.