BO OBAMA ALREADY KNOWS TRICKS: First Dog's trainer says he can sit, shake and roll over on command.

      *As the Obama family presented their new Portuguese water dog Bo to the press corps on Tuesday, his trainer was busy talking to Us Weekly about the types of tricks and obedience commands she has been teaching him since March.      

       "He sits very well, he does down very well. He shakes, he rolls over," says trainer Dawn Sylvia. "He knows his off command, which means don’t touch. He understands wait."      

       Bo is a "typical puppy," Sylvia continues. "He wants to play and he has his crazy moments like puppies do. But incredibly enough, I have owned and worked with a lot of dogs, and he is incredibly bright and sensitive and he thinks about things and he has an excellent memory."      

       Amigo Portuguese Water Dogs owner Art Stern, who bred the Obama pup, tells Us Weekly: "He's active, he's smart, he's laid-back and adaptable and should be a very good dog in the environment we envision goes on at the White House: very active, very busy, lots of people coming and going, lots of things happening."      

       The president is impressed with his new pet as well, telling reporters Tuesday, "He's got star quality. …That's a good looking dog, let's face it."      

       Obama says the entire family will "take turns walking the dog." Including him? "Of course!"      

       "I love him," Malia, 10, told reporters. "He's perfect."