CONGRESS IS BACK home, yes, but that doesn’t mean they’re hiding. Loads of Twitpics are being posted by Washington lawmakers in their moments of leisure. There’s Sen. John McCain (R-Ariz.) with his daughter, Sen. Clair McCaskill (D-Mo.) with her grandson, Rep. Darrell Issa (R-Calif.) with a chopper, Rep. Emanuel Cleaver (D-Mo.) with a foul ball, Sen. Chris Murphy (D-Conn.) with a cookie, and much, much else.