From the announcement:
The Library of Congress Digital Content Management Section is excited to announce the release of 4,240 new web archives across 43 event and thematic collections on loc.gov, our largest single release of web archives to date! Web archives such as Slate Magazine from 2002 to present, Elizabeth Mesa’s Iraq War blog, and Sri Lanka’s current president Maithripala Sirisena’s campaign website (no longer live on the web) are now waiting to be discovered alongside millions of other Library items. Keep watching The Signal for deeper dives into the unique collections with web archives now available on loc.gov. The Web Archiving Team sends its deepest gratitude to all involved in this significant achievement for the Library.