Gossip Roundup: Party On

* Under the Dome: Reuters will compete with Bloomberg for the hottest White House Correspondents’ Association after-party; theirs will be held at Kstreet. . . Tim Russert, David Gregory, and Sen. Kent Conrad attended the Nationals’ home opener. . . Harper’s taps the Los Angeles Times’ Ken Silverstein as its Washington editor. . . Fred Thompson endorses Sen. Chafee. [The Hill]
* Reliable Source: James Carville, Mary Matalin, Tony Williams, and Eleanor Holmes Norton were also on deck for the Nationals’ opener. . . Steve Carell was in town filming scenes for the sequel of “Bruce Almighty”. . . Jack Valenti is working on his memoirs. [WP]
* Page Six: New documentary aims to take Giuliani down a notch. [NYP]