Here’s something you might not know: President Barack Obama’s mother graduated from Mercer Island High School. Obama’s sister, Maya Soetoro-Ng, is in town this weekend to present a scholarship established in their mother’s memory. Soetoro-Ng told KPLU that she's not apolitical, necessarily, but she says when it comes to her relationship with her brother, President Obama, she prefers to focus on the family side of the equation. “I’m not like a Kennedy sibling," she told KPLU. "I try to offer a