Press releases are great primary sources to learn about federal actions and priorities, official statements, administrative changes, new resources, and opposing views about topics under discussion. I save press releases from many of these sites, including all of the agencies listed, regularly in the Wayback Machine in an effort to help preserve long-term access to information that may be of research interest. Where possible, I save the press release itself as well as documents (e.g. correspondence, publications) linked in the release.
The list of representatives is too long to include here, but you can find a directory and links to their websites at the House website. Most of the individual websites will have a link to News, Press, or Media at the top of page, and press releases will appear there.
Senate Committees, with Chairs and Ranking Members
Armed Services | Minority
House Committees, with Chairs and Ranking Members
Ethics | Minority