Polygamy has come to D.C.: The HBO drama “Big Love— is filming in the District, according to DCist.[IMGCAP(1)]Tipsters spotted the cast, including actress Chloe Sevigny, filming at Union Station over the weekend. The site says details about the show’s D.C. plot line are still sketchy, but it apparently involves Sissy Spacek playing a lobbyist.Frank and Bush: Frenemies. Despite agreeing on almost zero policy issues, Rep. Barney Frank (D-Mass.) and former President George W. Bush enjoyed “one-on-one banter,— according to the new biography of Frank that hits shelves today.In the book, author Stuart Weisberg reveals this behind-the-scenes exchange between the two polar opposites: In 2001, Frank was at the White House for the annual Congressional Christmas party and noticed on a gingerbread replica of the White House a small sign that read “Beware of Barney,— a reference to the Bush family dog. Frank joked to Bush that he didn’t take offense at the sign, and Bush agreed, as long as “you don’t do what Barney does in the White House … he pisses all over the place.— To which the ever-witty Frank replied, “Mr. President, how about if I just piss on some of your legislation?— Can’t get enough of the Frank-isms? Weisberg, an attorney and former House staffer, will discuss his book, “Barney Frank: The Story of America’s Only Left-Handed, Gay, Jewish Congressman,— at Dupont Circle’s Lambda Rising bookstore at 6:30 p.m. Wednesday. Submit your hot tips, juicy gossip or comments here.Can’t get enough HOH? Get a midday dose of fun and gossip with HOH’s One-Minute Recess, delivered to your inbox daily. Sign up here — because everyone deserves more recess.