President Barack Obama can’t stand to be without his “Entourage.” Call it a guilty pleasure, or maybe it just rings familiar to him. The HBO series about an aspiring actor features a fast-talking agent named Ari, based on the real-life brother of Obama’s chief of staff, Rahm Emanuel. For less R-rated fare, he tunes into “Hannah Montana” or “SpongeBob SquarePants” in the White House with his daughters. Aides said he would have watched Monday night’s NCAA championship on TiVo on his way home from Iraq Tuesday night. Jon Stewart’s smackdown of CNBC’s Jim Cramer? Obama was eager to see it....